Screw commit history.

code/__DEFINES/components.dm

@@ -218,6 +218,7 @@
 
 // /obj/item signals
 #define COMSIG_ITEM_ATTACK "item_attack"						//from base of obj/item/attack(): (/mob/living/target, /mob/living/user)
+#define COMSIG_MOB_APPLY_DAMGE	"mob_apply_damage"				//from base of /mob/living/proc/apply_damage(): (damage, damagetype, def_zone)
 #define COMSIG_ITEM_ATTACK_SELF "item_attack_self"				//from base of obj/item/attack_self(): (/mob)
 	#define COMPONENT_NO_INTERACT 1
 #define COMSIG_ITEM_ATTACK_OBJ "item_attack_obj"				//from base of obj/item/attack_obj(): (/obj, /mob)
@@ -231,6 +232,7 @@
 #define COMSIG_ITEM_ATTACK_ZONE "item_attack_zone"				//from base of mob/living/carbon/attacked_by(): (mob/living/carbon/target, mob/living/user, hit_zone)
 #define COMSIG_ITEM_IMBUE_SOUL "item_imbue_soul" 				//return a truthy value to prevent ensouling, checked in /obj/effect/proc_holder/spell/targeted/lichdom/cast(): (mob/user)
 #define COMSIG_ITEM_HIT_REACT "item_hit_react"					//from base of obj/item/hit_reaction(): (list/args)
+#define COMSIG_ITEM_WEARERCROSSED "wearer_crossed"                //called on item when crossed by something (): (/atom/movable)
 
 // /obj/item/clothing signals
 #define COMSIG_SHOES_STEP_ACTION "shoes_step_action"			//from base of obj/item/clothing/shoes/proc/step_action(): ()

code/__DEFINES/construction.dm

@@ -59,19 +59,6 @@
 //let's just pretend fulltile windows being children of border windows is fine
 #define FULLTILE_WINDOW_DIR NORTHEAST
 
-//Material defines, for determining how much of a given material an item contains
-#define MAT_METAL		"$metal"
-#define MAT_GLASS		"$glass"
-#define MAT_SILVER		"$silver"
-#define MAT_GOLD		"$gold"
-#define MAT_DIAMOND		"$diamond"
-#define MAT_URANIUM		"$uranium"
-#define MAT_PLASMA		"$plasma"
-#define MAT_BLUESPACE	"$bluespace"
-#define MAT_BANANIUM	"$bananium"
-#define MAT_TITANIUM	"$titanium"
-#define MAT_BIOMASS		"$biomass"
-#define MAT_PLASTIC	"$plastic"
 //The amount of materials you get from a sheet of mineral like iron/diamond/glass etc
 #define MINERAL_MATERIAL_AMOUNT 2000
 //The maximum size of a stack object.

code/__DEFINES/subsystems.dm

@@ -47,25 +47,26 @@
 // Subsystems shutdown in the reverse of the order they initialize in
 // The numbers just define the ordering, they are meaningless otherwise.
 
-#define INIT_ORDER_FAIL2TOPIC		22
-#define INIT_ORDER_TITLE			20
-#define INIT_ORDER_GARBAGE			19
-#define INIT_ORDER_DBCORE			18
-#define INIT_ORDER_BLACKBOX			17
-#define INIT_ORDER_SERVER_MAINT		16
-#define INIT_ORDER_INPUT			15
-#define INIT_ORDER_VIS				14
-#define INIT_ORDER_RESEARCH			13
-#define INIT_ORDER_EVENTS			12
-#define INIT_ORDER_JOBS				11
-#define INIT_ORDER_QUIRKS			10
-#define INIT_ORDER_TICKER			9
-#define INIT_ORDER_MAPPING			8
-#define INIT_ORDER_NETWORKS			7
-#define INIT_ORDER_ATOMS			6
-#define INIT_ORDER_LANGUAGE			5
-#define INIT_ORDER_MACHINES			4
-#define INIT_ORDER_CIRCUIT			3
+#define INIT_ORDER_FAIL2TOPIC		100
+#define INIT_ORDER_TITLE			99
+#define INIT_ORDER_GARBAGE			98
+#define INIT_ORDER_DBCORE			95
+#define INIT_ORDER_BLACKBOX			94
+#define INIT_ORDER_SERVER_MAINT		93
+#define INIT_ORDER_INPUT			85
+#define INIT_ORDER_VIS				80
+#define INIT_ORDER_MATERIALS		76
+#define INIT_ORDER_RESEARCH			75
+#define INIT_ORDER_EVENTS			70
+#define INIT_ORDER_JOBS				65
+#define INIT_ORDER_QUIRKS			60
+#define INIT_ORDER_TICKER			55
+#define INIT_ORDER_MAPPING			50
+#define INIT_ORDER_NETWORKS			45
+#define INIT_ORDER_ATOMS			30
+#define INIT_ORDER_LANGUAGE			25
+#define INIT_ORDER_MACHINES			20
+#define INIT_ORDER_CIRCUIT			15
 #define INIT_ORDER_TIMER			1
 #define INIT_ORDER_DEFAULT			0
 #define INIT_ORDER_AIR				-1

code/__HELPERS/global_lists.dm

@@ -87,11 +87,6 @@
 	for(var/path in subtypesof(/datum/surgery))
 		GLOB.surgeries_list += new path()
 
-	//Materials
-	for(var/path in subtypesof(/datum/material))
-		var/datum/material/D = new path()
-		GLOB.materials_list[D.id] = D
-
 	//Emotes
 	for(var/path in subtypesof(/datum/emote))
 		var/datum/emote/E = new path()

code/_globalvars/lists/objects.dm

@@ -16,7 +16,6 @@ GLOBAL_LIST_EMPTY(singularities)				    //list of all singularities on the stati
 
 GLOBAL_LIST(chemical_reactions_list)				//list of all /datum/chemical_reaction datums. Used during chemical reactions
 GLOBAL_LIST(chemical_reagents_list)				//list of all /datum/reagent datums indexed by reagent id. Used by chemistry stuff
-GLOBAL_LIST_EMPTY(materials_list)				//list of all /datum/material datums indexed by material id.
 GLOBAL_LIST_EMPTY(tech_list)					//list of all /datum/tech datums indexed by id.
 GLOBAL_LIST_EMPTY(surgeries_list)				//list of all surgeries by name, associated with their path.
 GLOBAL_LIST_EMPTY(uplink_items)					//list of all uplink item typepaths, ascendingly sorted by their initial name.

code/controllers/subsystem/research.dm

@@ -416,6 +416,7 @@ SUBSYSTEM_DEF(research)
 			stack_trace("WARNING: Design ID clash with ID [initial(DN.id)] detected! Path: [path]")
 			errored_datums[DN] = initial(DN.id)
 			continue
+		DN.InitializeMaterials() //Initialize the materials in the design
 		returned[initial(DN.id)] = DN
 	techweb_designs = returned
 	verify_techweb_designs()

code/datums/components/material_container.dm

@@ -1,4 +1,4 @@
-/*
+/*!
 	This datum should be used for handling mineral contents of machines and whatever else is supposed to hold minerals and make use of them.
 
 	Variables:
@@ -13,7 +13,7 @@
 	var/total_amount = 0
 	var/max_amount
 	var/sheet_type
-	var/list/materials
+	var/list/materials //Map of key = material ref | Value = amount
 	var/show_on_examine
 	var/disable_attackby
 	var/list/allowed_typecache
@@ -22,6 +22,7 @@
 	var/datum/callback/precondition
 	var/datum/callback/after_insert
 
+/// Sets up the proper signals and fills the list of materials with the appropriate references.
 /datum/component/material_container/Initialize(list/mat_list, max_amt = 0, _show_on_examine = FALSE, list/allowed_types, datum/callback/_precondition, datum/callback/_after_insert, _disable_attackby)
 	materials = list()
 	max_amount = max(0, max_amt)
@@ -40,23 +41,19 @@
 	RegisterSignal(parent, COMSIG_PARENT_ATTACKBY, .proc/OnAttackBy)
 	RegisterSignal(parent, COMSIG_PARENT_EXAMINE, .proc/OnExamine)
 
-	var/list/possible_mats = list()
-	for(var/mat_type in subtypesof(/datum/material))
-		var/datum/material/MT = mat_type
-		possible_mats[initial(MT.id)] = mat_type
-	for(var/id in mat_list)
-		if(possible_mats[id])
-			var/mat_path = possible_mats[id]
-			materials[id] = new mat_path()
+	for(var/mat in mat_list) //Make the assoc list ref | amount
+		var/datum/material/M = getmaterialref(mat) || mat
+		materials[M] = 0
 
 /datum/component/material_container/proc/OnExamine(datum/source, mob/user, list/examine_list)
 	if(show_on_examine)
 		for(var/I in materials)
-			var/datum/material/M = materials[I]
-			var/amt = amount(M.id)
+			var/datum/material/M = I
+			var/amt = materials[I]
 			if(amt)
 				examine_list += "<span class='notice'>It has [amt] units of [lowertext(M.name)] stored.</span>"
 
+/// Proc that allows players to fill the parent with mats
 /datum/component/material_container/proc/OnAttackBy(datum/source, obj/item/I, mob/living/user)
 	var/list/tc = allowed_typecache
 	if(disable_attackby)
@@ -74,13 +71,14 @@
 		return
 	var/material_amount = get_item_material_amount(I)
 	if(!material_amount)
-		to_chat(user, "<span class='warning'>[I] does not contain sufficient amounts of metal or glass to be accepted by [parent].</span>")
+		to_chat(user, "<span class='warning'>[I] does not contain sufficient materials to be accepted by [parent].</span>")
 		return
 	if(!has_space(material_amount))
-		to_chat(user, "<span class='warning'>[parent] is full. Please remove metal or glass from [parent] in order to insert more.</span>")
+		to_chat(user, "<span class='warning'>[parent] has not enough space. Please remove materials from [parent] in order to insert more.</span>")
 		return
 	user_insert(I, user)
 
+/// Proc used for when player inserts materials
 /datum/component/material_container/proc/user_insert(obj/item/I, mob/living/user)
 	set waitfor = FALSE
 	var/requested_amount
@@ -98,299 +96,225 @@
 		return
 	var/inserted = insert_item(I, stack_amt = requested_amount)
 	if(inserted)
-		if(istype(I, /obj/item/stack))
-			var/obj/item/stack/S = I
-			to_chat(user, "<span class='notice'>You insert [inserted] [S.singular_name][inserted>1 ? "s" : ""] into [parent].</span>")
-			if(!QDELETED(I) && I == active_held && !user.put_in_hands(I))
-				stack_trace("Warning: User could not put object back in hand during material container insertion, line [__LINE__]! This can lead to issues.")
-				I.forceMove(user.drop_location())
-		else
-			to_chat(user, "<span class='notice'>You insert a material total of [inserted] into [parent].</span>")
-			qdel(I)
+		to_chat(user, "<span class='notice'>You insert a material total of [inserted] into [parent].</span>")
+		qdel(I)
 		if(after_insert)
-			after_insert.Invoke(I.type, last_inserted_id, inserted)
+			after_insert.Invoke(I, last_inserted_id, inserted)
 	else if(I == active_held)
 		user.put_in_active_hand(I)
 
-//For inserting an amount of material
-/datum/component/material_container/proc/insert_amount(amt, id = null)
-	if(amt > 0 && has_space(amt))
-		var/total_amount_saved = total_amount
-		if(id)
-			var/datum/material/M = materials[id]
-			if(M)
-				M.amount += amt
-				total_amount += amt
-		else
-			for(var/i in materials)
-				var/datum/material/M = materials[i]
-				M.amount += amt
-				total_amount += amt
-		return (total_amount - total_amount_saved)
-	return FALSE
-
-/datum/component/material_container/proc/insert_stack(obj/item/stack/S, amt, multiplier = 1)
-	if(isnull(amt))
-		amt = S.amount
-
-	if(amt <= 0)
-		return FALSE
-
-	if(amt > S.amount)
-		amt = S.amount
-
-	var/material_amt = get_item_material_amount(S)
-	if(!material_amt)
-		return FALSE
-
-	amt = min(amt, round(((max_amount - total_amount) / material_amt)))
-	if(!amt)
-		return FALSE
-
-	last_inserted_id = insert_materials(S,amt * multiplier)
-	S.use(amt)
-	return amt
-
-/datum/component/material_container/proc/insert_item(obj/item/I, multiplier = 1, stack_amt)
+/// Proc specifically for inserting items, returns the amount of materials entered.
+/datum/component/material_container/proc/insert_item(obj/item/I, var/multiplier = 1, stack_amt)
 	if(!I)
 		return FALSE
-	if(istype(I, /obj/item/stack))
-		return insert_stack(I, stack_amt, multiplier)
+
+	multiplier = CEILING(multiplier, 0.01)
 
 	var/material_amount = get_item_material_amount(I)
 	if(!material_amount || !has_space(material_amount))
 		return FALSE
 
-	last_inserted_id = insert_materials(I, multiplier)
+	last_inserted_id = insert_item_materials(I, multiplier)
 	return material_amount
 
-/datum/component/material_container/proc/insert_materials(obj/item/I, multiplier = 1) //for internal usage only
-	var/datum/material/M
+/datum/component/material_container/proc/insert_item_materials(obj/item/I, multiplier = 1)
 	var/primary_mat
 	var/max_mat_value = 0
 	for(var/MAT in materials)
-		M = materials[MAT]
-		M.amount += I.materials[MAT] * multiplier
-		total_amount += I.materials[MAT] * multiplier
-		if(I.materials[MAT] > max_mat_value)
+		materials[MAT] += I.custom_materials[MAT] * multiplier
+		total_amount += I.custom_materials[MAT] * multiplier
+		if(I.custom_materials[MAT] > max_mat_value)
 			primary_mat = MAT
 	return primary_mat
 
-//For consuming material
-//mats is a list of types of material to use and the corresponding amounts, example: list(MAT_METAL=100, MAT_GLASS=200)
-/datum/component/material_container/proc/use_amount(list/mats, multiplier=1)
-	if(!mats || !mats.len)
-		return FALSE
+/// For inserting an amount of material
+/datum/component/material_container/proc/insert_amount_mat(amt, var/datum/material/mat)
+	if(!istype(mat))
+		mat = getmaterialref(mat)
+	if(amt > 0 && has_space(amt))
+		var/total_amount_saved = total_amount
+		if(mat)
+			materials[mat] += amt
+		else
+			for(var/i in materials)
+				materials[i] += amt
+				total_amount += amt
+		return (total_amount - total_amount_saved)
+	return FALSE
 
-	var/datum/material/M
-	for(var/MAT in materials)
-		M = materials[MAT]
-		if(M.amount < (mats[MAT] * multiplier))
-			return FALSE
-
-	var/total_amount_save = total_amount
-	for(var/MAT in materials)
-		M = materials[MAT]
-		M.amount -= mats[MAT] * multiplier
-		total_amount -= mats[MAT] * multiplier
-
-	return total_amount_save - total_amount
-
-
-/datum/component/material_container/proc/use_amount_type(amt, id)
-	var/datum/material/M = materials[id]
-	if(M)
-		if(M.amount >= amt)
-			M.amount -= amt
+/// Uses an amount of a specific material, effectively removing it.
+/datum/component/material_container/proc/use_amount_mat(amt, var/datum/material/mat)
+	if(!istype(mat))
+		mat = getmaterialref(mat)
+	var/amount = materials[mat]
+	if(mat)
+		if(amount >= amt)
+			materials[mat] -= amt
 			total_amount -= amt
 			return amt
 	return FALSE
 
-/datum/component/material_container/proc/transer_amt_to(var/datum/component/material_container/T, amt, id)
-	if((amt==0)||(!T)||(!id))
+/// Proc for transfering materials to another container.
+/datum/component/material_container/proc/transer_amt_to(var/datum/component/material_container/T, amt, var/datum/material/mat)
+	if(!istype(mat))
+		mat = getmaterialref(mat)
+	if((amt==0)||(!T)||(!mat))
 		return FALSE
 	if(amt<0)
-		return T.transer_amt_to(src, -amt, id)
-	var/datum/material/M = materials[id]
-
-	if(M)
-		var/tr = min(amt, M.amount,T.can_insert_amount(amt, id))
-		if(tr)
-			use_amount_type(tr, id)
-			T.insert_amount(tr, id)
-			return tr
+		return T.transer_amt_to(src, -amt, mat)
+	var/tr = min(amt, materials[mat],T.can_insert_amount_mat(amt, mat))
+	if(tr)
+		use_amount_mat(tr, mat)
+		T.insert_amount_mat(tr, mat)
+		return tr
 	return FALSE
 
-/datum/component/material_container/proc/can_insert_amount(amt, id)
-	if(amt && id)
-		var/datum/material/M = materials[id]
+/// Proc for checking if there is room in the component, returning the amount or else the amount lacking.
+/datum/component/material_container/proc/can_insert_amount_mat(amt, mat)
+	if(amt && mat)
+		var/datum/material/M = mat
 		if(M)
 			if((total_amount + amt) <= max_amount)
 				return amt
 			else
 				return	(max_amount-total_amount)
 
-/datum/component/material_container/proc/can_use_amount(amt, id, list/mats)
-	if(amt && id)
-		var/datum/material/M = materials[id]
-		if(M && M.amount >= amt)
-			return TRUE
-	else if(istype(mats))
-		for(var/M in mats)
-			if(materials[M] && (mats[M] <= materials[M]))
-				continue
-			else
-				return FALSE
-		return TRUE
-	return FALSE
 
-//For spawning mineral sheets; internal use only
-/datum/component/material_container/proc/retrieve(sheet_amt, datum/material/M, target = null)
+/// For consuming a dictionary of materials. mats is the map of materials to use and the corresponding amounts, example: list(M/datum/material/glass =100, datum/material/iron=200)
+/datum/component/material_container/proc/use_materials(list/mats, multiplier=1)
+	if(!mats || !length(mats))
+		return FALSE
+
+	var/list/mats_to_remove = list() //Assoc list MAT | AMOUNT
+
+	for(var/x in mats) //Loop through all required materials
+		var/datum/material/req_mat = x
+		if(!istype(req_mat))
+			req_mat = getmaterialref(req_mat) //Get the ref if necesary
+		if(!materials[req_mat]) //Do we have the resource?
+			return FALSE //Can't afford it
+		var/amount_required = mats[x] * multiplier
+		if(!(materials[req_mat] >= amount_required)) // do we have enough of the resource?
+			return FALSE //Can't afford it
+		mats_to_remove[req_mat] += amount_required //Add it to the assoc list of things to remove
+		continue
+
+	var/total_amount_save = total_amount
+
+	for(var/i in mats_to_remove)
+		total_amount_save -= use_amount_mat(mats_to_remove[i], i)
+
+	return total_amount_save - total_amount
+
+/// For spawning mineral sheets at a specific location. Used by machines to output sheets.
+/datum/component/material_container/proc/retrieve_sheets(sheet_amt, var/datum/material/M, target = null)
 	if(!M.sheet_type)
-		return 0
+		return 0 //Add greyscale sheet handling here later
 	if(sheet_amt <= 0)
 		return 0
 
 	if(!target)
 		target = get_turf(parent)
-	if(M.amount < (sheet_amt * MINERAL_MATERIAL_AMOUNT))
-		sheet_amt = round(M.amount / MINERAL_MATERIAL_AMOUNT)
+	if(materials[M] < (sheet_amt * MINERAL_MATERIAL_AMOUNT))
+		sheet_amt = round(materials[M] / MINERAL_MATERIAL_AMOUNT)
 	var/count = 0
 	while(sheet_amt > MAX_STACK_SIZE)
 		new M.sheet_type(target, MAX_STACK_SIZE)
 		count += MAX_STACK_SIZE
-		use_amount_type(sheet_amt * MINERAL_MATERIAL_AMOUNT, M.id)
+		use_amount_mat(sheet_amt * MINERAL_MATERIAL_AMOUNT, M)
 		sheet_amt -= MAX_STACK_SIZE
 	if(sheet_amt >= 1)
 		new M.sheet_type(target, sheet_amt)
 		count += sheet_amt
-		use_amount_type(sheet_amt * MINERAL_MATERIAL_AMOUNT, M.id)
+		use_amount_mat(sheet_amt * MINERAL_MATERIAL_AMOUNT, M)
 	return count
 
-/datum/component/material_container/proc/retrieve_sheets(sheet_amt, id, target = null)
-	if(materials[id])
-		return retrieve(sheet_amt, materials[id], target)
-	return FALSE
-
-/datum/component/material_container/proc/retrieve_amount(amt, id, target)
-	return retrieve_sheets(amount2sheet(amt), id, target)
 
+/// Proc to get all the materials and dump them as sheets
 /datum/component/material_container/proc/retrieve_all(target = null)
 	var/result = 0
-	var/datum/material/M
 	for(var/MAT in materials)
-		M = materials[MAT]
-		result += retrieve_sheets(amount2sheet(M.amount), MAT, target)
+		var/amount = materials[MAT]
+		result += retrieve_sheets(amount2sheet(amount), MAT, target)
 	return result
 
+/// Proc that returns TRUE if the container has space
 /datum/component/material_container/proc/has_space(amt = 0)
 	return (total_amount + amt) <= max_amount
 
+/// Checks if its possible to afford a certain amount of materials. Takes a dictionary of materials.
 /datum/component/material_container/proc/has_materials(list/mats, multiplier=1)
 	if(!mats || !mats.len)
 		return FALSE
 
-	var/datum/material/M
-	for(var/MAT in mats)
-		M = materials[MAT]
-		if(M.amount < (mats[MAT] * multiplier))
+	for(var/x in mats) //Loop through all required materials
+		var/datum/material/req_mat = x
+		if(!istype(req_mat))
+			if(ispath(req_mat)) //Is this an actual material, or is it a category?
+				req_mat = getmaterialref(req_mat) //Get the ref
+
+			else // Its a category. (For example MAT_CATEGORY_RIGID)
+				if(!has_enough_of_category(req_mat, mats[req_mat], multiplier)) //Do we have enough of this category?
+					return FALSE
+				else
+					continue
+
+		if(!has_enough_of_material(req_mat, mats[req_mat], multiplier))//Not a category, so just check the normal way
 			return FALSE
+
 	return TRUE
 
+/// Returns all the categories in a recipe.
+/datum/component/material_container/proc/get_categories(list/mats)
+	var/list/categories = list()
+	for(var/x in mats) //Loop through all required materials
+		if(!istext(x)) //This means its not a category
+			continue
+		categories += x
+	return categories
+
+
+/// Returns TRUE if you have enough of the specified material.
+/datum/component/material_container/proc/has_enough_of_material(var/datum/material/req_mat, amount, multiplier=1)
+	if(!materials[req_mat]) //Do we have the resource?
+		return FALSE //Can't afford it
+	var/amount_required = amount * multiplier
+	if(materials[req_mat] >= amount_required) // do we have enough of the resource?
+		return TRUE
+	return FALSE //Can't afford it
+
+/// Returns TRUE if you have enough of a specified material category (Which could be multiple materials)
+/datum/component/material_container/proc/has_enough_of_category(category, amount, multiplier=1)
+	for(var/i in SSmaterials.materials_by_category[category])
+		var/datum/material/mat = i
+		if(materials[mat] >= amount) //we have enough
+			return TRUE
+	return FALSE
+
+/// Turns a material amount into the amount of sheets it should output
 /datum/component/material_container/proc/amount2sheet(amt)
 	if(amt >= MINERAL_MATERIAL_AMOUNT)
 		return round(amt / MINERAL_MATERIAL_AMOUNT)
 	return FALSE
 
+/// Turns an amount of sheets into the amount of material amount it should output
 /datum/component/material_container/proc/sheet2amount(sheet_amt)
 	if(sheet_amt > 0)
 		return sheet_amt * MINERAL_MATERIAL_AMOUNT
 	return FALSE
 
-/datum/component/material_container/proc/amount(id)
-	var/datum/material/M = materials[id]
-	return M ? M.amount : 0
 
-//returns the amount of material relevant to this container;
-//if this container does not support glass, any glass in 'I' will not be taken into account
+///returns the amount of material relevant to this container; if this container does not support glass, any glass in 'I' will not be taken into account
 /datum/component/material_container/proc/get_item_material_amount(obj/item/I)
-	if(!istype(I))
+	if(!istype(I) || !I.custom_materials)
 		return FALSE
 	var/material_amount = 0
 	for(var/MAT in materials)
-		material_amount += I.materials[MAT]
+		material_amount += I.custom_materials[MAT]
 	return material_amount
 
-
-/datum/material
-	var/name
-	var/amount = 0
-	var/id = null
-	var/sheet_type = null
-	var/coin_type = null
-
-/datum/material/metal
-	name = "Metal"
-	id = MAT_METAL
-	sheet_type = /obj/item/stack/sheet/metal
-	coin_type = /obj/item/coin/iron
-
-/datum/material/glass
-	name = "Glass"
-	id = MAT_GLASS
-	sheet_type = /obj/item/stack/sheet/glass
-
-/datum/material/silver
-	name = "Silver"
-	id = MAT_SILVER
-	sheet_type = /obj/item/stack/sheet/mineral/silver
-	coin_type = /obj/item/coin/silver
-
-/datum/material/gold
-	name = "Gold"
-	id = MAT_GOLD
-	sheet_type = /obj/item/stack/sheet/mineral/gold
-	coin_type = /obj/item/coin/gold
-
-/datum/material/diamond
-	name = "Diamond"
-	id = MAT_DIAMOND
-	sheet_type = /obj/item/stack/sheet/mineral/diamond
-	coin_type = /obj/item/coin/diamond
-
-/datum/material/uranium
-	name = "Uranium"
-	id = MAT_URANIUM
-	sheet_type = /obj/item/stack/sheet/mineral/uranium
-	coin_type = /obj/item/coin/uranium
-
-/datum/material/plasma
-	name = "Solid Plasma"
-	id = MAT_PLASMA
-	sheet_type = /obj/item/stack/sheet/mineral/plasma
-	coin_type = /obj/item/coin/plasma
-
-/datum/material/bluespace
-	name = "Bluespace Mesh"
-	id = MAT_BLUESPACE
-	sheet_type = /obj/item/stack/sheet/bluespace_crystal
-
-/datum/material/bananium
-	name = "Bananium"
-	id = MAT_BANANIUM
-	sheet_type = /obj/item/stack/sheet/mineral/bananium
-	coin_type = /obj/item/coin/bananium
-
-/datum/material/titanium
-	name = "Titanium"
-	id = MAT_TITANIUM
-	sheet_type = /obj/item/stack/sheet/mineral/titanium
-
-/datum/material/biomass
-	name = "Biomass"
-	id = MAT_BIOMASS
-
-/datum/material/plastic
-	name = "Plastic"
-	id = MAT_PLASTIC
-	sheet_type = /obj/item/stack/sheet/plastic
+/// Returns the amount of a specific material in this container.
+/datum/component/material_container/proc/get_material_amount(var/datum/material/mat)
+	if(!istype(mat))
+		mat = getmaterialref(mat)
+	return(materials[mat])

code/datums/components/radioactive.dm

@@ -77,6 +77,8 @@
 /datum/component/radioactive/proc/rad_attack(datum/source, atom/movable/target, mob/living/user)
 	radiation_pulse(parent, strength/20)
 	target.rad_act(strength/2)
+	if(!hl3_release_date)
+		return
 	strength -= strength / hl3_release_date
 
 #undef RAD_AMOUNT_LOW

code/datums/components/remote_materials.dm

@@ -54,7 +54,7 @@ handles linking back and forth.
 /datum/component/remote_materials/proc/_MakeLocal()
 	silo = null
 	mat_container = parent.AddComponent(/datum/component/material_container,
-		list(MAT_METAL, MAT_GLASS, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_PLASMA, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM, MAT_BLUESPACE, MAT_PLASTIC),
+		list(/datum/material/iron, /datum/material/glass, /datum/material/silver, /datum/material/gold, /datum/material/diamond, /datum/material/plasma, /datum/material/uranium, /datum/material/bananium, /datum/material/titanium, /datum/material/bluespace, /datum/material/plastic),
 		local_size,
 		FALSE,
 		/obj/item/stack)

code/datums/components/slippery.dm

@@ -7,7 +7,7 @@
 	intensity = max(_intensity, 0)
 	lube_flags = _lube_flags
 	callback = _callback
-	RegisterSignal(parent, list(COMSIG_MOVABLE_CROSSED, COMSIG_ATOM_ENTERED), .proc/Slip)
+	RegisterSignal(parent, list(COMSIG_MOVABLE_CROSSED, COMSIG_ATOM_ENTERED, COMSIG_ITEM_WEARERCROSSED), .proc/Slip)
 
 /datum/component/slippery/proc/Slip(datum/source, atom/movable/AM)
 	var/mob/victim = AM

code/datums/components/squeak.dm

@@ -18,7 +18,7 @@
 	RegisterSignal(parent, list(COMSIG_ATOM_ENTERED, COMSIG_ATOM_BLOB_ACT, COMSIG_ATOM_HULK_ATTACK, COMSIG_PARENT_ATTACKBY), .proc/play_squeak)
 	if(ismovableatom(parent))
 		RegisterSignal(parent, list(COMSIG_MOVABLE_BUMP, COMSIG_MOVABLE_IMPACT), .proc/play_squeak)
-		RegisterSignal(parent, COMSIG_MOVABLE_CROSSED, .proc/play_squeak_crossed)
+		RegisterSignal(parent, list(COMSIG_MOVABLE_CROSSED, COMSIG_ITEM_WEARERCROSSED), .proc/play_squeak_crossed)
 		RegisterSignal(parent, COMSIG_MOVABLE_DISPOSING, .proc/disposing_react)
 		if(isitem(parent))
 			RegisterSignal(parent, list(COMSIG_ITEM_ATTACK, COMSIG_ITEM_ATTACK_OBJ, COMSIG_ITEM_HIT_REACT), .proc/play_squeak)

code/datums/holocall.dm

@@ -216,7 +216,7 @@
 	desc = "Stores recorder holocalls."
 	icon_state = "holodisk"
 	obj_flags = UNIQUE_RENAME
-	materials = list(MAT_METAL = 100, MAT_GLASS = 100)
+	custom_materials = list(/datum/material/iron = 100, /datum/material/glass = 100)
 	var/datum/holorecord/record
 	//Preset variables
 	var/preset_image_type

code/datums/ruins/lavaland.dm

@@ -224,6 +224,13 @@
 	allow_duplicates = FALSE
 	cost = 5
 
+/datum/map_template/ruin/lavaland/dark_wizards
+	name = "Dark Wizard Altar"
+	id = "dark_wizards"
+	description = "A ruin with dark wizards. What secret do they guard?"
+	suffix = "lavaland_surface_wizard.dmm"
+	cost = 5
+
 /datum/map_template/ruin/lavaland/puzzle
 	name = "Ancient Puzzle"
 	id = "puzzle"

code/datums/ruins/space.dm

@@ -311,6 +311,12 @@
 	name = "Space Hermit"
 	description = "A late awakening cryo pod in a crashed escape pod wakes up to find what befell of his fellow survivors. Contains all the necessary resources to actually make it out alive. Good luck."
 
+/datum/map_template/ruin/space/clericden
+	id = "clericden"
+	suffix = "clericden.dmm"
+	name = "Cleric's Den"
+	description = "Once part of a larger monastery, this holy order of long dead clerics practiced far less non-violence than they preached. Appears to have been untouched by looters, however. Odd."
+
 /datum/map_template/ruin/space/advancedlab
 	id = "advancedlab"
 	suffix = "advancedlab.dmm"

code/game/atoms.dm

@@ -38,6 +38,13 @@
 	var/rad_flags = NONE // Will move to flags_1 when i can be arsed to
 	var/rad_insulation = RAD_NO_INSULATION
 
+	///The custom materials this atom is made of, used by a lot of things like furniture, walls, and floors (if I finish the functionality, that is.)
+	var/list/custom_materials
+	///Bitfield for how the atom handles materials.
+	var/material_flags = NONE
+	///Modifier that raises/lowers the effect of the amount of a material, prevents small and easy to get items from being death machines.
+	var/material_modifier = 1
+
 	var/icon/blood_splatter_icon
 	var/list/fingerprints
 	var/list/fingerprintshidden
@@ -89,6 +96,12 @@
 	if (canSmoothWith)
 		canSmoothWith = typelist("canSmoothWith", canSmoothWith)
 
+	var/temp_list = list()
+	for(var/i in custom_materials)
+		temp_list[getmaterialref(i)] = custom_materials[i] //Get the proper instanced version
+	custom_materials = null //Null the list to prepare for applying the materials properly
+	set_custom_materials(temp_list)
+
 	ComponentInitialize()
 
 	return INITIALIZE_HINT_NORMAL
@@ -290,6 +303,11 @@
 	if(desc)
 		. += desc
 
+	if(custom_materials)
+		for(var/i in custom_materials)
+			var/datum/material/M = i
+			. += "<u>It is made out of [M.name]</u>."
+
 	if(reagents)
 		if(reagents.reagents_holder_flags & TRANSPARENT)
 			. += "It contains:"
@@ -863,4 +881,28 @@ Proc for attack log creation, because really why not
 		return TRUE
 
 /atom/proc/intercept_zImpact(atom/movable/AM, levels = 1)
-	. |= SEND_SIGNAL(src, COMSIG_ATOM_INTERCEPT_Z_FALL, AM, levels)
+	. |= SEND_SIGNAL(src, COMSIG_ATOM_INTERCEPT_Z_FALL, AM, levels)
+
+///Sets the custom materials for an item.
+/atom/proc/set_custom_materials(var/list/materials, multiplier = 1)
+
+	if(!materials)
+		materials = custom_materials
+
+	if(custom_materials) //Only runs if custom materials existed at first. Should usually be the case but check anyways
+		for(var/i in custom_materials)
+			var/datum/material/custom_material = getmaterialref(i)
+			custom_material.on_removed(src, material_flags) //Remove the current materials
+
+	if(!length(materials))
+		return
+
+	custom_materials = list() //Reset the list
+
+	for(var/x in materials)
+		var/datum/material/custom_material = getmaterialref(x)
+
+		if(!(material_flags & MATERIAL_NO_EFFECTS))
+			custom_material.on_applied(src, materials[custom_material] * multiplier * material_modifier, material_flags)
+		custom_materials[custom_material] += materials[x] * multiplier
+

code/game/gamemodes/clown_ops/clown_weapons.dm

@@ -40,14 +40,14 @@
 /obj/item/clothing/shoes/clown_shoes/banana_shoes/combat/Initialize()
 	. = ..()
 	var/datum/component/material_container/bananium = GetComponent(/datum/component/material_container)
-	bananium.insert_amount(max_recharge, MAT_BANANIUM)
+	bananium.insert_amount_mat(max_recharge, /datum/material/bananium)
 	START_PROCESSING(SSobj, src)
 
 /obj/item/clothing/shoes/clown_shoes/banana_shoes/combat/process()
 	var/datum/component/material_container/bananium = GetComponent(/datum/component/material_container)
-	var/bananium_amount = bananium.amount(MAT_BANANIUM)
+	var/bananium_amount = bananium.get_material_amount(/datum/material/bananium)
 	if(bananium_amount < max_recharge)
-		bananium.insert_amount(min(recharge_rate, max_recharge - bananium_amount), MAT_BANANIUM)
+		bananium.insert_amount_mat(min(recharge_rate, max_recharge - bananium_amount), /datum/material/bananium)
 
 /obj/item/clothing/shoes/clown_shoes/banana_shoes/combat/attack_self(mob/user)
 	ui_action_click(user)

code/game/gamemodes/gangs/dominator.dm

@@ -13,7 +13,7 @@
 	anchored = TRUE
 	layer = HIGH_OBJ_LAYER
 	max_integrity = 300
-	integrity_failure = 100
+	integrity_failure = 0.33
 	armor = list("melee" = 20, "bullet" = 50, "laser" = 50, "energy" = 50, "bomb" = 10, "bio" = 100, "rad" = 100, "fire" = 10, "acid" = 70)
 	var/datum/team/gang/gang
 	var/operating = FALSE	//false=standby or broken, true=takeover

code/game/machinery/autolathe.dm

@@ -46,7 +46,23 @@
 							)
 
 /obj/machinery/autolathe/Initialize()
-	AddComponent(/datum/component/material_container, list(MAT_METAL, MAT_GLASS), 0, TRUE, null, null, CALLBACK(src, .proc/AfterMaterialInsert))
+	AddComponent(/datum/component/material_container,
+	list(/datum/material/iron,
+		/datum/material/glass,
+		/datum/material/gold,
+		/datum/material/silver,
+		/datum/material/diamond,
+		/datum/material/uranium,
+		/datum/material/plasma,
+		/datum/material/bluespace,
+		/datum/material/bananium,
+		/datum/material/titanium,
+		/datum/material/runite,
+		/datum/material/plastic,
+		/datum/material/adamantine,
+		/datum/material/mythril
+	),
+	 0, TRUE, null, null, CALLBACK(src, .proc/AfterMaterialInsert))
 	. = ..()
 
 	wires = new /datum/wires/autolathe(src)
@@ -120,15 +136,14 @@
 
 	return ..()
 
-/obj/machinery/autolathe/proc/AfterMaterialInsert(type_inserted, id_inserted, amount_inserted)
-	if(ispath(type_inserted, /obj/item/stack/ore/bluespace_crystal))
+/obj/machinery/autolathe/proc/AfterMaterialInsert(obj/item/item_inserted, id_inserted, amount_inserted)
+	if(istype(item_inserted, /obj/item/stack/ore/bluespace_crystal))
 		use_power(MINERAL_MATERIAL_AMOUNT / 10)
+	else if(item_inserted.custom_materials?.len && item_inserted.custom_materials[getmaterialref(/datum/material/glass)])
+		flick("autolathe_r",src)//plays glass insertion animation by default otherwise
 	else
-		switch(id_inserted)
-			if (MAT_METAL)
-				flick("autolathe_o",src)//plays metal insertion animation
-			if (MAT_GLASS)
-				flick("autolathe_r",src)//plays glass insertion animation
+		flick("autolathe_o",src)//plays metal insertion animation
+
 		use_power(min(1000, amount_inserted / 100))
 	updateUsrDialog()
 
@@ -159,18 +174,42 @@
 			/////////////////
 
 			var/coeff = (is_stack ? 1 : prod_coeff) //stacks are unaffected by production coefficient
-			var/metal_cost = being_built.materials[MAT_METAL]
-			var/glass_cost = being_built.materials[MAT_GLASS]
+			var/total_amount = 0
 
-			var/power = max(2000, (metal_cost+glass_cost)*multiplier/5)
+			for(var/MAT in being_built.materials)
+				total_amount += being_built.materials[MAT]
+
+			var/power = max(2000, (total_amount)*multiplier/5) //Change this to use all materials
 
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			if((materials.amount(MAT_METAL) >= metal_cost*multiplier*coeff) && (materials.amount(MAT_GLASS) >= glass_cost*multiplier*coeff))
+
+			var/list/materials_used = list()
+			var/list/custom_materials = list() //These will apply their material effect, This should usually only be one.
+
+			for(var/MAT in being_built.materials)
+				var/datum/material/used_material = MAT
+				var/amount_needed = being_built.materials[MAT] * coeff * multiplier
+				if(istext(used_material)) //This means its a category
+					var/list/list_to_show = list()
+					for(var/i in SSmaterials.materials_by_category[used_material])
+						if(materials.materials[i] > 0)
+							list_to_show += i
+
+					used_material = input("Choose [used_material]", "Custom Material") as null|anything in list_to_show
+					if(!used_material)
+						return //Didn't pick any material, so you can't build shit either.
+					custom_materials[used_material] += amount_needed
+
+				materials_used[used_material] = amount_needed
+
+			if(materials.has_materials(materials_used))
 				busy = TRUE
 				use_power(power)
 				icon_state = "autolathe_n"
 				var/time = is_stack ? 32 : 32*coeff*multiplier
-				addtimer(CALLBACK(src, .proc/make_item, power, metal_cost, glass_cost, multiplier, coeff, is_stack), time)
+				addtimer(CALLBACK(src, .proc/make_item, power, materials_used, custom_materials, multiplier, coeff, is_stack), time)
+			else
+				to_chat(usr, "<span class=\"alert\">Not enough materials for this operation.</span>")
 
 		if(href_list["search"])
 			matching_designs.Cut()
@@ -187,12 +226,11 @@
 
 	return
 
-/obj/machinery/autolathe/proc/make_item(power, metal_cost, glass_cost, multiplier, coeff, is_stack)
+/obj/machinery/autolathe/proc/make_item(power, var/list/materials_used, var/list/picked_materials, multiplier, coeff, is_stack)
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
 	var/atom/A = drop_location()
 	use_power(power)
-	var/list/materials_used = list(MAT_METAL=metal_cost*coeff*multiplier, MAT_GLASS=glass_cost*coeff*multiplier)
-	materials.use_amount(materials_used)
+	materials.use_materials(materials_used)
 
 	if(is_stack)
 		var/obj/item/stack/N = new being_built.build_path(A, multiplier)
@@ -201,10 +239,11 @@
 	else
 		for(var/i=1, i<=multiplier, i++)
 			var/obj/item/new_item = new being_built.build_path(A)
-			new_item.materials = new_item.materials.Copy()
-			for(var/mat in materials_used)
-				new_item.materials[mat] = materials_used[mat] / multiplier
 			new_item.autolathe_crafted(src)
+
+			if(length(picked_materials))
+				new_item.set_custom_materials(picked_materials, 1 / multiplier) //Ensure we get the non multiplied amount
+
 	icon_state = "autolathe"
 	busy = FALSE
 	updateDialog()
@@ -269,7 +308,9 @@
 
 		if(ispath(D.build_path, /obj/item/stack))
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			var/max_multiplier = min(D.maxstack, D.materials[MAT_METAL] ?round(materials.amount(MAT_METAL)/D.materials[MAT_METAL]):INFINITY,D.materials[MAT_GLASS]?round(materials.amount(MAT_GLASS)/D.materials[MAT_GLASS]):INFINITY)
+			var/max_multiplier
+			for(var/datum/material/mat in D.materials)
+				max_multiplier = min(D.maxstack, round(materials.get_material_amount(mat)/D.materials[mat]))
 			if (max_multiplier>10 && !disabled)
 				dat += " <a href='?src=[REF(src)];make=[D.id];multiplier=10'>x10</a>"
 			if (max_multiplier>25 && !disabled)
@@ -301,7 +342,9 @@
 
 		if(ispath(D.build_path, /obj/item/stack))
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			var/max_multiplier = min(D.maxstack, D.materials[MAT_METAL] ?round(materials.amount(MAT_METAL)/D.materials[MAT_METAL]):INFINITY,D.materials[MAT_GLASS]?round(materials.amount(MAT_GLASS)/D.materials[MAT_GLASS]):INFINITY)
+			var/max_multiplier
+			for(var/datum/material/mat in D.materials)
+				max_multiplier = min(D.maxstack, round(materials.get_material_amount(mat)/D.materials[mat]))
 			if (max_multiplier>10 && !disabled)
 				dat += " <a href='?src=[REF(src)];make=[D.id];multiplier=10'>x10</a>"
 			if (max_multiplier>25 && !disabled)
@@ -318,8 +361,10 @@
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
 	var/dat = "<b>Total amount:</b> [materials.total_amount] / [materials.max_amount] cm<sup>3</sup><br>"
 	for(var/mat_id in materials.materials)
-		var/datum/material/M = materials.materials[mat_id]
-		dat += "<b>[M.name] amount:</b> [M.amount] cm<sup>3</sup><br>"
+		var/datum/material/M = mat_id
+		var/mineral_amount = materials.materials[mat_id]
+		if(mineral_amount > 0)
+			dat += "<b>[M.name] amount:</b> [mineral_amount] cm<sup>3</sup><br>"
 	return dat
 
 /obj/machinery/autolathe/proc/can_build(datum/design/D, amount = 1)
@@ -328,20 +373,24 @@
 
 	var/coeff = (ispath(D.build_path, /obj/item/stack) ? 1 : prod_coeff)
 
+	var/list/required_materials = list()
+
+	for(var/i in D.materials)
+		required_materials[i] = D.materials[i] * coeff * amount
+
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-	if(D.materials[MAT_METAL] && (materials.amount(MAT_METAL) < (D.materials[MAT_METAL] * coeff * amount)))
-		return FALSE
-	if(D.materials[MAT_GLASS] && (materials.amount(MAT_GLASS) < (D.materials[MAT_GLASS] * coeff * amount)))
-		return FALSE
-	return TRUE
+
+	return materials.has_materials(required_materials)
 
 /obj/machinery/autolathe/proc/get_design_cost(datum/design/D)
 	var/coeff = (ispath(D.build_path, /obj/item/stack) ? 1 : prod_coeff)
 	var/dat
-	if(D.materials[MAT_METAL])
-		dat += "[D.materials[MAT_METAL] * coeff] metal "
-	if(D.materials[MAT_GLASS])
-		dat += "[D.materials[MAT_GLASS] * coeff] glass"
+	for(var/i in D.materials)
+		if(istext(i)) //Category handling
+			dat += "[D.materials[i] * coeff] [i]"
+		else
+			var/datum/material/M = i
+			dat += "[D.materials[i] * coeff] [M.name] "
 	return dat
 
 /obj/machinery/autolathe/proc/reset(wire)

code/game/machinery/buttons.dm

@@ -265,4 +265,4 @@
 	desc = "Used for building buttons."
 	icon_state = "button"
 	result_path = /obj/machinery/button
-	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron = MINERAL_MATERIAL_AMOUNT)

code/game/machinery/camera/camera.dm

@@ -17,7 +17,7 @@
 
 	armor = list("melee" = 50, "bullet" = 20, "laser" = 20, "energy" = 20, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 90, "acid" = 50)
 	max_integrity = 100
-	integrity_failure = 50
+	integrity_failure = 0.5
 	var/list/network = list("ss13")
 	var/c_tag = null
 	var/status = TRUE

code/game/machinery/camera/camera_assembly.dm

@@ -3,7 +3,7 @@
 	desc = "The basic construction for Nanotrasen-Always-Watching-You cameras."
 	icon = 'icons/obj/machines/camera.dmi'
 	icon_state = "cameracase"
-	materials = list(MAT_METAL=400, MAT_GLASS=250)
+	custom_materials = list(/datum/material/iron=400, /datum/material/glass=250)
 	result_path = /obj/structure/camera_assembly
 
 

code/game/machinery/computer/_computer.dm

@@ -7,7 +7,7 @@
 	idle_power_usage = 300
 	active_power_usage = 300
 	max_integrity = 200
-	integrity_failure = 100
+	integrity_failure = 0.5
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 40, "acid" = 20)
 	var/brightness_on = 1
 	var/icon_keyboard = "generic_key"

code/game/machinery/defibrillator_mount.dm

@@ -144,7 +144,7 @@
 	desc = "A frame for a defibrillator mount. It can't be removed once it's placed."
 	icon = 'icons/obj/machines/defib_mount.dmi'
 	icon_state = "defibrillator_mount"
-	materials = list(MAT_METAL = 300, MAT_GLASS = 100)
+	custom_materials = list(/datum/material/iron = 300, /datum/material/glass = 100)
 	w_class = WEIGHT_CLASS_BULKY
 	result_path = /obj/machinery/defibrillator_mount
 	pixel_shift = -28

code/game/machinery/deployable.dm

@@ -15,7 +15,7 @@
 	density = TRUE
 	max_integrity = 100
 	var/proj_pass_rate = 50 //How many projectiles will pass the cover. Lower means stronger cover
-	var/material = METAL
+	var/bar_material = METAL
 
 /obj/structure/barricade/deconstruct(disassembled = TRUE)
 	if(!(flags_1 & NODECONSTRUCT_1))
@@ -26,7 +26,7 @@
 	return
 
 /obj/structure/barricade/attackby(obj/item/I, mob/user, params)
-	if(istype(I, /obj/item/weldingtool) && user.a_intent != INTENT_HARM && material == METAL)
+	if(istype(I, /obj/item/weldingtool) && user.a_intent != INTENT_HARM && bar_material == METAL)
 		if(obj_integrity < max_integrity)
 			if(!I.tool_start_check(user, amount=0))
 				return
@@ -61,7 +61,7 @@
 	desc = "This space is blocked off by a wooden barricade."
 	icon = 'icons/obj/structures.dmi'
 	icon_state = "woodenbarricade"
-	material = WOOD
+	bar_material = WOOD
 	var/drop_amount = 3
 
 /obj/structure/barricade/wooden/attackby(obj/item/I, mob/user)
@@ -106,7 +106,7 @@
 	max_integrity = 280
 	proj_pass_rate = 20
 	pass_flags = LETPASSTHROW
-	material = SAND
+	bar_material = SAND
 	climbable = TRUE
 	smooth = SMOOTH_TRUE
 	canSmoothWith = list(/obj/structure/barricade/sandbags, /turf/closed/wall, /turf/closed/wall/r_wall, /obj/structure/falsewall, /obj/structure/falsewall/reinforced, /turf/closed/wall/rust, /turf/closed/wall/r_wall/rust, /obj/structure/barricade/security)

code/game/machinery/doors/airlock.dm

@@ -47,7 +47,7 @@
 	icon_state = "closed"
 	max_integrity = 300
 	var/normal_integrity = AIRLOCK_INTEGRITY_N
-	integrity_failure = 70
+	integrity_failure = 0.25
 	damage_deflection = AIRLOCK_DAMAGE_DEFLECTION_N
 	autoclose = TRUE
 	secondsElectrified = 0 //How many seconds remain until the door is no longer electrified. -1 if it is permanently electrified until someone fixes it.
@@ -469,7 +469,7 @@
 					panel_overlay = get_airlock_overlay("panel_closed", overlays_file)
 			if(welded)
 				weld_overlay = get_airlock_overlay("welded", overlays_file)
-			if(obj_integrity <integrity_failure)
+			if(obj_integrity < integrity_failure * max_integrity)
 				damag_overlay = get_airlock_overlay("sparks_broken", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)
 			else if(obj_integrity < (0.75 * max_integrity))
 				damag_overlay = get_airlock_overlay("sparks_damaged", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)
@@ -495,7 +495,7 @@
 					panel_overlay = get_airlock_overlay("panel_closed_protected", overlays_file)
 				else
 					panel_overlay = get_airlock_overlay("panel_closed", overlays_file)
-			if(obj_integrity <integrity_failure)
+			if(obj_integrity < integrity_failure * max_integrity)
 				damag_overlay = get_airlock_overlay("sparks_broken", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)
 			else if(obj_integrity < (0.75 * max_integrity))
 				damag_overlay = get_airlock_overlay("sparks_damaged", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)
@@ -517,7 +517,7 @@
 					panel_overlay = get_airlock_overlay("panel_closed_protected", overlays_file)
 				else
 					panel_overlay = get_airlock_overlay("panel_closed", overlays_file)
-			if(obj_integrity <integrity_failure)
+			if(obj_integrity < integrity_failure * max_integrity)
 				damag_overlay = get_airlock_overlay("sparks_broken", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)
 			else if(obj_integrity < (0.75 * max_integrity))
 				damag_overlay = get_airlock_overlay("sparks_damaged", overlays_file, ABOVE_LIGHTING_LAYER, ABOVE_LIGHTING_PLANE)

code/game/machinery/droneDispenser.dm

@@ -11,7 +11,7 @@
 	density = TRUE
 
 	max_integrity = 250
-	integrity_failure = 80
+	integrity_failure = 0.33
 
 	// These allow for different icons when creating custom dispensers
 	var/icon_off = "off"
@@ -50,10 +50,10 @@
 
 /obj/machinery/droneDispenser/Initialize()
 	. = ..()
-	var/datum/component/material_container/materials = AddComponent(/datum/component/material_container, list(MAT_METAL, MAT_GLASS), MINERAL_MATERIAL_AMOUNT * MAX_STACK_SIZE * 2, TRUE, /obj/item/stack)
-	materials.insert_amount(starting_amount)
+	var/datum/component/material_container/materials = AddComponent(/datum/component/material_container, list(/datum/material/iron, /datum/material/glass), MINERAL_MATERIAL_AMOUNT * MAX_STACK_SIZE * 2, TRUE, /obj/item/stack)
+	materials.insert_amount_mat(starting_amount)
 	materials.precise_insertion = TRUE
-	using_materials = list(MAT_METAL=metal_cost, MAT_GLASS=glass_cost)
+	using_materials = list(/datum/material/iron = metal_cost, /datum/material/glass = glass_cost)
 
 /obj/machinery/droneDispenser/preloaded
 	starting_amount = 5000
@@ -168,7 +168,7 @@
 			update_icon()
 
 		if(DRONE_PRODUCTION)
-			materials.use_amount(using_materials)
+			materials.use_materials(using_materials)
 			if(power_used)
 				use_power(power_used)
 

code/game/machinery/firealarm.dm

@@ -17,7 +17,7 @@
 	icon = 'icons/obj/monitors.dmi'
 	icon_state = "fire0"
 	max_integrity = 250
-	integrity_failure = 100
+	integrity_failure = 0.4
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 100, "rad" = 100, "fire" = 90, "acid" = 30)
 	use_power = IDLE_POWER_USE
 	idle_power_usage = 2

code/game/machinery/flasher.dm

@@ -6,7 +6,7 @@
 	icon = 'icons/obj/stationobjs.dmi'
 	icon_state = "mflash1"
 	max_integrity = 250
-	integrity_failure = 100
+	integrity_failure = 0.4
 	light_color = LIGHT_COLOR_WHITE
 	light_power = FLASH_LIGHT_POWER
 	var/obj/item/assembly/flash/handheld/bulb

code/game/machinery/newscaster.dm

@@ -174,7 +174,7 @@ GLOBAL_LIST_EMPTY(allCasters)
 	name = "newscaster frame"
 	desc = "Used to build newscasters, just secure to the wall."
 	icon_state = "newscaster"
-	materials = list(MAT_METAL=14000, MAT_GLASS=8000)
+	custom_materials = list(/datum/material/iron=14000, /datum/material/glass=8000)
 	result_path = /obj/machinery/newscaster
 
 
@@ -188,7 +188,7 @@ GLOBAL_LIST_EMPTY(allCasters)
 	verb_exclaim = "beeps"
 	armor = list("melee" = 50, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 30)
 	max_integrity = 200
-	integrity_failure = 50
+	integrity_failure = 0.25
 	var/screen = 0
 	var/paper_remaining = 15
 	var/securityCaster = 0

code/game/machinery/porta_turret/portable_turret.dm

@@ -26,7 +26,7 @@
 	var/raising= 0			//if the turret is currently opening or closing its cover
 
 	max_integrity = 160		//the turret's health
-	integrity_failure = 80
+	integrity_failure = 0.5
 	armor = list("melee" = 50, "bullet" = 30, "laser" = 30, "energy" = 30, "bomb" = 30, "bio" = 0, "rad" = 0, "fire" = 90, "acid" = 90)
 
 	var/locked = TRUE			//if the turret's behaviour control access is locked
@@ -691,7 +691,6 @@
 	return 10 //Syndicate turrets shoot everything not in their faction
 
 /obj/machinery/porta_turret/syndicate/pod
-	integrity_failure = 20
 	max_integrity = 40
 	stun_projectile = /obj/item/projectile/bullet/syndicate_turret
 	lethal_projectile = /obj/item/projectile/bullet/syndicate_turret
@@ -773,7 +772,6 @@
 
 /obj/machinery/porta_turret/centcom_shuttle/weak
 	max_integrity = 120
-	integrity_failure = 60
 	name = "Old Laser Turret"
 	desc = "A turret built with substandard parts and run down further with age. Still capable of delivering lethal lasers to the odd space carp, but not much else."
 	stun_projectile = /obj/item/projectile/beam/weak/penetrator
@@ -963,7 +961,7 @@
 	desc = "Used for building turret control panels."
 	icon_state = "apc"
 	result_path = /obj/machinery/turretid
-	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron=MINERAL_MATERIAL_AMOUNT)
 
 /obj/item/gun/proc/get_turret_properties()
 	. = list()

code/game/machinery/recycler.dm

@@ -19,7 +19,7 @@
 
 /obj/machinery/recycler/Initialize()
 	AddComponent(/datum/component/butchering/recycler, 1, amount_produced,amount_produced/5)
-	AddComponent(/datum/component/material_container, list(MAT_METAL, MAT_GLASS, MAT_PLASMA, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM, MAT_BLUESPACE, MAT_PLASTIC), INFINITY, FALSE, null, null, null, TRUE)
+	AddComponent(/datum/component/material_container, list(/datum/material/iron, /datum/material/glass, /datum/material/silver, /datum/material/plasma, /datum/material/gold, /datum/material/diamond, /datum/material/plastic, /datum/material/uranium, /datum/material/bananium, /datum/material/titanium, /datum/material/bluespace), INFINITY, FALSE, null, null, null, TRUE)
 	. = ..()
 	update_icon()
 	req_one_access = get_all_accesses() + get_all_centcom_access()

code/game/machinery/slotmachine.dm

@@ -92,7 +92,7 @@
 		else
 			if(!user.temporarilyRemoveItemFromInventory(C))
 				return
-			to_chat(user, "<span class='notice'>You insert a [C.cmineral] coin into [src]'s slot!</span>")
+			to_chat(user, "<span class='notice'>You insert [C] into [src]'s slot!</span>")
 			balance += C.value
 			qdel(C)
 	else

code/game/machinery/toylathe.dm

@@ -46,7 +46,7 @@
 							)
 
 /obj/machinery/autoylathe/Initialize()
-	AddComponent(/datum/component/material_container, list(MAT_METAL, MAT_GLASS, MAT_PLASTIC), 0, TRUE, null, null, CALLBACK(src, .proc/AfterMaterialInsert))
+	AddComponent(/datum/component/material_container, list(/datum/material/iron, /datum/material/glass, /datum/material/plastic), 0, TRUE, null, null, CALLBACK(src, .proc/AfterMaterialInsert))
 	. = ..()
 
 	wires = new /datum/wires/autoylathe(src)
@@ -120,18 +120,13 @@
 
 	return ..()
 
-/obj/machinery/autoylathe/proc/AfterMaterialInsert(type_inserted, id_inserted, amount_inserted)
-	if(ispath(type_inserted, /obj/item/stack/ore/bluespace_crystal))
-		use_power(amount_inserted / 10)
+/obj/machinery/autoylathe/proc/AfterMaterialInsert(obj/item/item_inserted, id_inserted, amount_inserted)
+	if(item_inserted.custom_materials?.len && item_inserted.custom_materials[getmaterialref(/datum/material/glass)])
+		flick("autolathe_r",src)//plays glass insertion animation by default otherwise
 	else
-		switch(id_inserted)
-			if (MAT_METAL)
-				flick("autolathe_o",src)//plays metal insertion animation
-			if (MAT_GLASS)
-				flick("autolathe_r",src)//plays glass insertion animation
-			if (MAT_PLASTIC)
-				flick("autolathe_o",src)//plays metal insertion animation
-		use_power(amount_inserted / 10)
+		flick("autolathe_o",src)//plays metal insertion animation
+
+	use_power(min(1000, amount_inserted / 100))
 	updateUsrDialog()
 
 /obj/machinery/autoylathe/Topic(href, href_list)
@@ -161,18 +156,40 @@
 			/////////////////
 
 			var/coeff = (is_stack ? 1 : prod_coeff) //stacks are unaffected by production coefficient
-			var/metal_cost = being_built.materials[MAT_METAL]
-			var/glass_cost = being_built.materials[MAT_GLASS]
-			var/plastic_cost = being_built.materials[MAT_PLASTIC]
-			var/power = max(2000, (metal_cost+glass_cost+plastic_cost)*multiplier/5)
+			var/total_amount = 0
+			for(var/MAT in being_built.materials)
+				total_amount += being_built.materials[MAT]
+			var/power = max(2000, (total_amount)*multiplier/5) //Change this to use all materials
 
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			if((materials.amount(MAT_METAL) >= metal_cost*multiplier*coeff) && (materials.amount(MAT_GLASS) >= glass_cost*multiplier*coeff) && (materials.amount(MAT_PLASTIC) >= plastic_cost*multiplier*coeff))
+
+			var/list/materials_used = list()
+			var/list/custom_materials = list() //These will apply their material effect, This should usually only be one.
+
+			for(var/MAT in being_built.materials)
+				var/datum/material/used_material = MAT
+				var/amount_needed = being_built.materials[MAT] * coeff * multiplier
+				if(istext(used_material)) //This means its a category
+					var/list/list_to_show = list()
+					for(var/i in SSmaterials.materials_by_category[used_material])
+						if(materials.materials[i] > 0)
+							list_to_show += i
+
+					used_material = input("Choose [used_material]", "Custom Material") as null|anything in list_to_show
+					if(!used_material)
+						return //Didn't pick any material, so you can't build shit either.
+					custom_materials[used_material] += amount_needed
+
+				materials_used[used_material] = amount_needed
+
+			if(materials.has_materials(materials_used))
 				busy = TRUE
 				use_power(power)
 				icon_state = "autolathe_n"
 				var/time = is_stack ? 32 : 32*coeff*multiplier
-				addtimer(CALLBACK(src, .proc/make_item, power, metal_cost, glass_cost, plastic_cost, multiplier, coeff, is_stack), time)
+				addtimer(CALLBACK(src, .proc/make_item, power, materials_used, custom_materials, multiplier, coeff, is_stack), time)
+			else
+				to_chat(usr, "<span class=\"alert\">Not enough materials for this operation.</span>")
 
 		if(href_list["search"])
 			matching_designs.Cut()
@@ -189,12 +206,11 @@
 
 	return
 
-/obj/machinery/autoylathe/proc/make_item(power, metal_cost, glass_cost, plastic_cost, multiplier, coeff, is_stack)
+/obj/machinery/autoylathe/proc/make_item(power, list/materials_used, list/picked_materials, multiplier, coeff, is_stack)
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
 	var/atom/A = drop_location()
 	use_power(power)
-	var/list/materials_used = list(MAT_METAL=metal_cost*coeff*multiplier, MAT_GLASS=glass_cost*coeff*multiplier, MAT_PLASTIC=plastic_cost*coeff*multiplier)
-	materials.use_amount(materials_used)
+	materials.use_materials(materials_used)
 
 	if(is_stack)
 		var/obj/item/stack/N = new being_built.build_path(A, multiplier)
@@ -203,10 +219,9 @@
 	else
 		for(var/i=1, i<=multiplier, i++)
 			var/obj/item/new_item = new being_built.build_path(A)
-			new_item.materials = new_item.materials.Copy()
-			for(var/mat in materials_used)
-				new_item.materials[mat] = materials_used[mat] / multiplier
 			new_item.autoylathe_crafted(src)
+			if(length(picked_materials))
+				new_item.set_custom_materials(picked_materials, 1 / multiplier) //Ensure we get the non multiplied amount
 	icon_state = "autolathe"
 	busy = FALSE
 	updateDialog()
@@ -265,7 +280,9 @@
 
 		if(ispath(D.build_path, /obj/item/stack))
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			var/max_multiplier = min(D.maxstack, D.materials[MAT_METAL] ?round(materials.amount(MAT_METAL)/D.materials[MAT_METAL]):INFINITY,D.materials[MAT_GLASS] ?round(materials.amount(MAT_GLASS)/D.materials[MAT_GLASS]):INFINITY,D.materials[MAT_PLASTIC] ?round(materials.amount(MAT_PLASTIC)/D.materials[MAT_PLASTIC]):INFINITY)
+			var/max_multiplier
+			for(var/datum/material/mat in D.materials)
+				max_multiplier = min(D.maxstack, round(materials.get_material_amount(mat)/D.materials[mat]))
 			if (max_multiplier>10 && !disabled)
 				dat += " <a href='?src=[REF(src)];make=[D.id];multiplier=10'>x10</a>"
 			if (max_multiplier>25 && !disabled)
@@ -297,7 +314,9 @@
 
 		if(ispath(D.build_path, /obj/item/stack))
 			var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-			var/max_multiplier = min(D.maxstack, D.materials[MAT_METAL] ?round(materials.amount(MAT_METAL)/D.materials[MAT_METAL]):INFINITY,D.materials[MAT_GLASS] ?round(materials.amount(MAT_GLASS)/D.materials[MAT_GLASS]):INFINITY,D.materials[MAT_PLASTIC] ?round(materials.amount(MAT_PLASTIC)/D.materials[MAT_PLASTIC]):INFINITY)
+			var/max_multiplier
+			for(var/datum/material/mat in D.materials)
+				max_multiplier = min(D.maxstack, round(materials.get_material_amount(mat)/D.materials[mat]))
 			if (max_multiplier>10 && !disabled)
 				dat += " <a href='?src=[REF(src)];make=[D.id];multiplier=10'>x10</a>"
 			if (max_multiplier>25 && !disabled)
@@ -314,8 +333,10 @@
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
 	var/dat = "<b>Total amount:</b> [materials.total_amount] / [materials.max_amount] cm<sup>3</sup><br>"
 	for(var/mat_id in materials.materials)
-		var/datum/material/M = materials.materials[mat_id]
-		dat += "<b>[M.name] amount:</b> [M.amount] cm<sup>3</sup><br>"
+		var/datum/material/M = mat_id
+		var/mineral_amount = materials.materials[mat_id]
+		if(mineral_amount > 0)
+			dat += "<b>[M.name] amount:</b> [mineral_amount] cm<sup>3</sup><br>"
 	return dat
 
 /obj/machinery/autoylathe/proc/can_build(datum/design/D, amount = 1)
@@ -324,24 +345,24 @@
 
 	var/coeff = (ispath(D.build_path, /obj/item/stack) ? 1 : prod_coeff)
 
+	var/list/required_materials = list()
+
+	for(var/i in D.materials)
+		required_materials[i] = D.materials[i] * coeff * amount
+
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-	if(D.materials[MAT_METAL] && (materials.amount(MAT_METAL) < (D.materials[MAT_METAL] * coeff * amount)))
-		return FALSE
-	if(D.materials[MAT_GLASS] && (materials.amount(MAT_GLASS) < (D.materials[MAT_GLASS] * coeff * amount)))
-		return FALSE
-	if(D.materials[MAT_PLASTIC] && (materials.amount(MAT_PLASTIC) < (D.materials[MAT_PLASTIC] * coeff * amount)))
-		return FALSE
-	return TRUE
+
+	return materials.has_materials(required_materials)
 
 /obj/machinery/autoylathe/proc/get_design_cost(datum/design/D)
 	var/coeff = (ispath(D.build_path, /obj/item/stack) ? 1 : prod_coeff)
 	var/dat
-	if(D.materials[MAT_METAL])
-		dat += "[D.materials[MAT_METAL] * coeff] metal "
-	if(D.materials[MAT_GLASS])
-		dat += "[D.materials[MAT_GLASS] * coeff] glass "
-	if(D.materials[MAT_PLASTIC])
-		dat += "[D.materials[MAT_PLASTIC] * coeff] plastic"
+	for(var/i in D.materials)
+		if(istext(i)) //Category handling
+			dat += "[D.materials[i] * coeff] [i]"
+		else
+			var/datum/material/M = i
+			dat += "[D.materials[i] * coeff] [M.name] "
 	return dat
 
 /obj/machinery/autoylathe/proc/reset(wire)

code/game/mecha/equipment/tools/medical_tools.dm

@@ -529,7 +529,8 @@
 	range = MELEE|RANGED
 	equip_cooldown = 0
 	var/obj/item/gun/medbeam/mech/medigun
-	materials = list(MAT_METAL = 15000, MAT_GLASS = 8000, MAT_PLASMA = 3000, MAT_GOLD = 8000, MAT_DIAMOND = 2000)
+	custom_materials = list(/datum/material/iron = 15000, /datum/material/glass = 8000, /datum/material/plasma = 3000, /datum/material/gold = 8000, /datum/material/diamond = 2000)
+	material_flags = MATERIAL_NO_EFFECTS
 
 /obj/item/mecha_parts/mecha_equipment/medical/mechmedbeam/Initialize()
 	. = ..()

code/game/mecha/equipment/tools/other_tools.dm

@@ -388,7 +388,7 @@
 /obj/item/mecha_parts/mecha_equipment/generator/get_equip_info()
 	var/output = ..()
 	if(output)
-		return "[output] \[[fuel]: [round(fuel.amount*fuel.perunit,0.1)] cm<sup>3</sup>\] - <a href='?src=[REF(src)];toggle=1'>[equip_ready?"A":"Dea"]ctivate</a>"
+		return "[output] \[[fuel]: [round(fuel.amount*fuel.mats_per_stack,0.1)] cm<sup>3</sup>\] - <a href='?src=[REF(src)];toggle=1'>[equip_ready?"A":"Dea"]ctivate</a>"
 
 /obj/item/mecha_parts/mecha_equipment/generator/action(target)
 	if(chassis)
@@ -398,9 +398,9 @@
 
 /obj/item/mecha_parts/mecha_equipment/generator/proc/load_fuel(var/obj/item/stack/sheet/P)
 	if(P.type == fuel.type && P.amount > 0)
-		var/to_load = max(max_fuel - fuel.amount*fuel.perunit,0)
+		var/to_load = max(max_fuel - fuel.amount*fuel.mats_per_stack,0)
 		if(to_load)
-			var/units = min(max(round(to_load / P.perunit),1),P.amount)
+			var/units = min(max(round(to_load / P.mats_per_stack),1),P.amount)
 			fuel.amount += units
 			P.use(units)
 			occupant_message("[units] unit\s of [fuel] successfully loaded.")
@@ -454,7 +454,7 @@
 	if(cur_charge < chassis.cell.maxcharge)
 		use_fuel = fuel_per_cycle_active
 		chassis.give_power(power_per_cycle)
-	fuel.amount -= min(use_fuel/fuel.perunit,fuel.amount)
+	fuel.amount -= min(use_fuel/fuel.mats_per_stack,fuel.amount)
 	update_equip_info()
 	return 1
 

code/game/mecha/mech_fabricator.dm

@@ -35,7 +35,7 @@
 
 /obj/machinery/mecha_part_fabricator/Initialize()
 	var/datum/component/material_container/materials = AddComponent(/datum/component/material_container,
-		list(MAT_METAL, MAT_GLASS, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_PLASMA, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM, MAT_BLUESPACE), 0,
+	list(/datum/material/iron, /datum/material/glass, /datum/material/silver, /datum/material/gold, /datum/material/diamond, /datum/material/plasma, /datum/material/uranium, /datum/material/bananium, /datum/material/titanium, /datum/material/bluespace), 0,
 		TRUE, /obj/item/stack, CALLBACK(src, .proc/is_insertion_ready), CALLBACK(src, .proc/AfterMaterialInsert))
 	materials.precise_insertion = TRUE
 	stored_research = new
@@ -108,7 +108,8 @@
 	var/i = 0
 	var/output
 	for(var/c in D.materials)
-		output += "[i?" | ":null][get_resource_cost_w_coeff(D, c)] [material2name(c)]"
+		var/datum/material/M = c
+		output += "[i?" | ":null][get_resource_cost_w_coeff(D, M)] [M.name]"
 		i++
 	return output
 
@@ -116,20 +117,22 @@
 	var/output
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
 	for(var/mat_id in materials.materials)
-		var/datum/material/M = materials.materials[mat_id]
-		output += "<span class=\"res_name\">[M.name]: </span>[M.amount] cm&sup3;"
-		if(M.amount >= MINERAL_MATERIAL_AMOUNT)
-			output += "<span style='font-size:80%;'>- Remove \[<a href='?src=[REF(src)];remove_mat=1;material=[mat_id]'>1</a>\]"
-			if(M.amount >= (MINERAL_MATERIAL_AMOUNT * 10))
-				output += " | \[<a href='?src=[REF(src)];remove_mat=10;material=[mat_id]'>10</a>\]"
-			output += " | \[<a href='?src=[REF(src)];remove_mat=50;material=[mat_id]'>All</a>\]</span>"
+		var/datum/material/M = mat_id
+		var/amount = materials.materials[mat_id]
+		output += "<span class=\"res_name\">[M.name]: </span>[amount] cm&sup3;"
+		if(amount >= MINERAL_MATERIAL_AMOUNT)
+			output += "<span style='font-size:80%;'>- Remove \[<a href='?src=[REF(src)];remove_mat=1;material=[REF(mat_id)]'>1</a>\]"
+			if(amount >= (MINERAL_MATERIAL_AMOUNT * 10))
+				output += " | \[<a href='?src=[REF(src)];remove_mat=10;material=[REF(M)]'>10</a>\]"
+			output += " | \[<a href='?src=[REF(src)];remove_mat=50;material=[REF(M)]'>All</a>\]</span>"
 		output += "<br/>"
 	return output
 
 /obj/machinery/mecha_part_fabricator/proc/get_resources_w_coeff(datum/design/D)
 	var/list/resources = list()
 	for(var/R in D.materials)
-		resources[R] = get_resource_cost_w_coeff(D, R)
+		var/datum/material/M = R
+		resources[M] = get_resource_cost_w_coeff(D, M)
 	return resources
 
 /obj/machinery/mecha_part_fabricator/proc/check_resources(datum/design/D)
@@ -146,7 +149,7 @@
 	var/list/res_coef = get_resources_w_coeff(D)
 
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-	materials.use_amount(res_coef)
+	materials.use_materials(res_coef)
 	add_overlay("fab-active")
 	use_power = ACTIVE_POWER_USE
 	updateUsrDialog()
@@ -157,7 +160,8 @@
 
 	var/location = get_step(src,(dir))
 	var/obj/item/I = new D.build_path(location)
-	I.materials = res_coef
+	I.material_flags |= MATERIAL_NO_EFFECTS //Find a better way to do this.
+	I.set_custom_materials(res_coef)
 	say("\The [I] is complete.")
 	being_built = null
 
@@ -250,7 +254,7 @@
 	updateUsrDialog()
 	return
 
-/obj/machinery/mecha_part_fabricator/proc/get_resource_cost_w_coeff(datum/design/D, resource, roundto = 1)
+/obj/machinery/mecha_part_fabricator/proc/get_resource_cost_w_coeff(datum/design/D, var/datum/material/resource, roundto = 1)
 	return round(D.materials[resource]*component_coeff, roundto)
 
 /obj/machinery/mecha_part_fabricator/proc/get_construction_time_w_coeff(datum/design/D, roundto = 1) //aran
@@ -390,7 +394,8 @@
 
 	if(href_list["remove_mat"] && href_list["material"])
 		var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)
-		materials.retrieve_sheets(text2num(href_list["remove_mat"]), href_list["material"])
+		var/datum/material/Mat = locate(href_list["material"])
+		materials.retrieve_sheets(text2num(href_list["remove_mat"]), Mat)
 
 	updateUsrDialog()
 	return
@@ -400,10 +405,10 @@
 	materials.retrieve_all()
 	..()
 
-/obj/machinery/mecha_part_fabricator/proc/AfterMaterialInsert(type_inserted, id_inserted, amount_inserted)
-	var/stack_name = material2name(id_inserted)
-	add_overlay("fab-load-[stack_name]")
-	addtimer(CALLBACK(src, /atom/proc/cut_overlay, "fab-load-[stack_name]"), 10)
+/obj/machinery/mecha_part_fabricator/proc/AfterMaterialInsert(item_inserted, id_inserted, amount_inserted)
+	var/datum/material/M = id_inserted
+	add_overlay("fab-load-[M.name]")
+	addtimer(CALLBACK(src, /atom/proc/cut_overlay, "fab-load-[M.name]"), 10)
 	updateUsrDialog()
 
 /obj/machinery/mecha_part_fabricator/attackby(obj/item/W, mob/user, params)
@@ -415,9 +420,6 @@
 
 	return ..()
 
-/obj/machinery/mecha_part_fabricator/proc/material2name(ID)
-	return copytext(ID,2)
-
 /obj/machinery/mecha_part_fabricator/proc/is_insertion_ready(mob/user)
 	if(panel_open)
 		to_chat(user, "<span class='warning'>You can't load [src] while it's opened!</span>")

code/game/objects/items.dm

@@ -68,7 +68,6 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 	var/equip_delay_other = 20 //In deciseconds, how long an item takes to put on another person
 	var/strip_delay = 40 //In deciseconds, how long an item takes to remove from another person
 	var/breakouttime = 0
-	var/list/materials
 	var/reskinned = FALSE
 
 	var/list/attack_verb //Used in attackby() to say how something was attacked "[x] has been [z.attack_verb] by [y] with [z]"
@@ -112,8 +111,6 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 
 /obj/item/Initialize()
 
-	materials =	typelist("materials", materials)
-
 	if (attack_verb)
 		attack_verb = typelist("attack_verb", attack_verb)
 
@@ -233,9 +230,9 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 
 	// Extractable materials. Only shows the names, not the amounts.
 	research_msg += ".<br><font color='purple'>Extractable materials:</font> "
-	if (materials.len)
+	if (length(custom_materials))
 		sep = ""
-		for(var/mat in materials)
+		for(var/mat in custom_materials)
 			research_msg += sep
 			research_msg += CallMaterialName(mat)
 			sep = ", "

code/game/objects/items/AI_modules.dm

@@ -22,7 +22,7 @@ AI MODULES
 	throw_range = 7
 	var/list/laws = list()
 	var/bypass_law_amt_check = 0
-	materials = list(MAT_GOLD=50)
+	custom_materials = list(/datum/material/gold=50)
 
 /obj/item/aiModule/examine(var/mob/user as mob)
 	. = ..()

code/game/objects/items/RCD.dm

@@ -22,7 +22,7 @@ RLD
 	throw_speed = 3
 	throw_range = 5
 	w_class = WEIGHT_CLASS_NORMAL
-	materials = list(MAT_METAL=100000)
+	custom_materials = list(/datum/material/iron=100000)
 	req_access_txt = "11"
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 50)
 	resistance_flags = FIRE_PROOF
@@ -603,7 +603,7 @@ RLD
 	energyfactor = 66
 
 /obj/item/construction/rcd/loaded
-	materials = list(MAT_METAL=48000, MAT_GLASS=32000)
+	custom_materials = list(/datum/material/iron = 48000, /datum/material/glass = 32000)
 	matter = 160
 
 /obj/item/construction/rcd/loaded/upgraded
@@ -635,13 +635,13 @@ RLD
 	item_state = "rcdammo"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
-	materials = list(MAT_METAL=12000, MAT_GLASS=8000)
+	custom_materials = list(/datum/material/iron=12000, /datum/material/glass=8000)
 	var/ammoamt = 40
 
 /obj/item/rcd_ammo/large
 	name = "large compressed matter cartridge"
 	desc = "Highly compressed matter for the RCD. Has four times the matter packed into the same space as a normal cartridge."
-	materials = list(MAT_METAL=48000, MAT_GLASS=32000)
+	custom_materials = list(/datum/material/iron=48000, /datum/material/glass=32000)
 	ammoamt = 160
 
 

code/game/objects/items/RPD.dm

@@ -188,7 +188,7 @@ GLOBAL_LIST_INIT(transit_tube_recipes, list(
 	throw_speed = 1
 	throw_range = 5
 	w_class = WEIGHT_CLASS_NORMAL
-	materials = list(MAT_METAL=75000, MAT_GLASS=37500)
+	custom_materials = list(/datum/material/iron=75000, /datum/material/glass=37500)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 50)
 	resistance_flags = FIRE_PROOF
 	var/datum/effect_system/spark_spread/spark_system

code/game/objects/items/airlock_painter.dm

@@ -7,7 +7,7 @@
 
 	w_class = WEIGHT_CLASS_SMALL
 
-	materials = list(MAT_METAL=50, MAT_GLASS=50)
+	custom_materials = list(/datum/material/iron=50, /datum/material/glass=50)
 
 	flags_1 = CONDUCT_1
 	item_flags = NOBLUDGEON

code/game/objects/items/apc_frame.dm

@@ -1,6 +1,6 @@
 /obj/item/wallframe
 	icon = 'icons/obj/wallframe.dmi'
-	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT*2)
+	custom_materials = list(/datum/material/iron=MINERAL_MATERIAL_AMOUNT*2)
 	flags_1 = CONDUCT_1
 	item_state = "syringe_kit"
 	lefthand_file = 'icons/mob/inhands/equipment/medical_lefthand.dmi'
@@ -66,8 +66,8 @@
 		if(iswallturf(T))
 			T.attackby(src, user, params)
 
-	var/metal_amt = round(materials[MAT_METAL]/MINERAL_MATERIAL_AMOUNT)
-	var/glass_amt = round(materials[MAT_GLASS]/MINERAL_MATERIAL_AMOUNT)
+	var/metal_amt = round(custom_materials[getmaterialref(/datum/material/iron)]/MINERAL_MATERIAL_AMOUNT)
+	var/glass_amt = round(custom_materials[getmaterialref(/datum/material/glass)]/MINERAL_MATERIAL_AMOUNT)
 
 	if(istype(W, /obj/item/wrench) && (metal_amt || glass_amt))
 		to_chat(user, "<span class='notice'>You dismantle [src].</span>")
@@ -119,5 +119,5 @@
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
 	flags_1 = CONDUCT_1
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=50, MAT_GLASS=50)
+	custom_materials = list(/datum/material/iron=50, /datum/material/glass=50)
 	grind_results = list(/datum/reagent/iron = 10, /datum/reagent/silicon = 10)

code/game/objects/items/circuitboards/circuitboard.dm

@@ -10,7 +10,7 @@
 	item_state = "electronic"
 	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
-	materials = list(MAT_GLASS=1000)
+	custom_materials = list(/datum/material/glass=1000)
 	w_class = WEIGHT_CLASS_SMALL
 	grind_results = list(/datum/reagent/silicon = 20)
 	var/build_path = null

code/game/objects/items/defib.dm

@@ -745,22 +745,22 @@
 	name = "Defibrillator Healing Disk"
 	desc = "An upgrade which increases the healing power of the defibrillator"
 	icon_state = "heal_disk"
-	materials = list(MAT_METAL=16000, MAT_GLASS = 18000, MAT_GOLD = 6000, MAT_SILVER = 6000)
+	custom_materials = list(/datum/material/iron=16000, /datum/material/glass = 18000, /datum/material/gold = 6000, /datum/material/silver = 6000)
 
 /obj/item/disk/medical/defib_shock
 	name = "Defibrillator Anti-Shock Disk"
 	desc = "A safety upgrade that guarantees only the patient will get shocked"
 	icon_state = "zap_disk"
-	materials = list(MAT_METAL=16000, MAT_GLASS = 18000, MAT_GOLD = 6000, MAT_SILVER = 6000)
+	custom_materials = list(/datum/material/iron=16000, /datum/material/glass = 18000, /datum/material/gold = 6000, /datum/material/silver = 6000)
 
 /obj/item/disk/medical/defib_decay
 	name = "Defibrillator Body-Decay Extender Disk"
 	desc = "An upgrade allowing the defibrillator to work on more decayed bodies"
 	icon_state = "body_disk"
-	materials = list(MAT_METAL=16000, MAT_GLASS = 18000, MAT_GOLD = 16000, MAT_SILVER = 6000, MAT_TITANIUM = 2000)
+	custom_materials = list(/datum/material/iron=16000, /datum/material/glass = 18000, /datum/material/gold = 16000, /datum/material/silver = 6000, /datum/material/titanium = 2000)
 
 /obj/item/disk/medical/defib_speed
 	name = "Defibrillator Fast Charge Disk"
 	desc = "An upgrade to the defibrillator capacitors, which let it charge faster"
 	icon_state = "fast_disk"
-	materials = list(MAT_METAL=16000, MAT_GLASS = 8000, MAT_GOLD = 26000, MAT_SILVER = 26000)
+	custom_materials = list(/datum/material/iron=16000, /datum/material/glass = 8000, /datum/material/gold = 26000, /datum/material/silver = 26000)

code/game/objects/items/devices/desynchronizer.dm

@@ -8,7 +8,7 @@
 	item_flags = NOBLUDGEON
 	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
-	materials = list(MAT_METAL = 250, MAT_GLASS = 500)
+	custom_materials = list(/datum/material/iron = 250, /datum/material/glass = 500)
 	var/max_duration = 3000
 	var/duration = 300
 	var/last_use = 0

code/game/objects/items/devices/doorCharge.dm

@@ -12,7 +12,7 @@
 	item_flags = NOBLUDGEON
 	force = 3
 	attack_verb = list("blown up", "exploded", "detonated")
-	materials = list(MAT_METAL=50, MAT_GLASS=30)
+	custom_materials = list(/datum/material/iron=50, /datum/material/glass=30)
 
 /obj/item/doorCharge/ex_act(severity, target)
 	switch(severity)

code/game/objects/items/devices/electroadaptive_pseudocircuit.dm

@@ -5,7 +5,7 @@
 	icon = 'icons/obj/module.dmi'
 	icon_state = "boris"
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_METAL = 50, MAT_GLASS = 300)
+	custom_materials = list(/datum/material/iron = 50, /datum/material/glass = 300)
 	var/recharging = FALSE
 	var/circuits = 5 //How many circuits the pseudocircuit has left
 	var/static/recycleable_circuits = typecacheof(list(/obj/item/electronics/firelock, /obj/item/electronics/airalarm, /obj/item/electronics/firealarm, \

code/game/objects/items/devices/flashlight.dm

@@ -9,7 +9,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	flags_1 = CONDUCT_1
 	slot_flags = ITEM_SLOT_BELT
-	materials = list(MAT_METAL=50, MAT_GLASS=20)
+	custom_materials = list(/datum/material/iron=50, /datum/material/glass=20)
 	actions_types = list(/datum/action/item_action/toggle_light)
 	var/on = FALSE
 	var/brightness_on = 4 //range of light when on
@@ -224,7 +224,7 @@
 	light_color = "#FFDDBB"
 	w_class = WEIGHT_CLASS_BULKY
 	flags_1 = CONDUCT_1
-	materials = list()
+	custom_materials = null
 	on = TRUE
 
 
@@ -362,7 +362,7 @@
 	item_state = "slime"
 	w_class = WEIGHT_CLASS_SMALL
 	slot_flags = ITEM_SLOT_BELT
-	materials = list()
+	custom_materials = null
 	brightness_on = 6 //luminosity when on
 	light_color = "#FFEEAA"
 	flashlight_power = 0.6

code/game/objects/items/devices/forcefieldprojector.dm

@@ -9,7 +9,7 @@
 	item_state = "electronic"
 	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
-	materials = list(MAT_METAL=250, MAT_GLASS=500)
+	custom_materials = list(/datum/material/iron=250, /datum/material/glass=500)
 	var/max_shield_integrity = 100
 	var/shield_integrity = 250
 	var/max_fields = 3

code/game/objects/items/devices/geiger_counter.dm

@@ -18,7 +18,7 @@
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
 	w_class = WEIGHT_CLASS_SMALL
 	slot_flags = ITEM_SLOT_BELT
-	materials = list(MAT_METAL = 150, MAT_GLASS = 150)
+	custom_materials = list(/datum/material/iron = 150, /datum/material/glass = 150)
 
 	var/grace = RAD_GRACE_PERIOD
 	var/datum/looping_sound/geiger/soundloop

code/game/objects/items/devices/laserpointer.dm

@@ -8,7 +8,7 @@
 	flags_1 = CONDUCT_1
 	item_flags = NOBLUDGEON
 	slot_flags = ITEM_SLOT_BELT
-	materials = list(MAT_METAL=500, MAT_GLASS=500)
+	custom_materials = list(/datum/material/iron=500, /datum/material/glass=500)
 	w_class = WEIGHT_CLASS_SMALL
 	var/turf/pointer_loc
 	var/energy = 5

code/game/objects/items/devices/multitool.dm

@@ -24,7 +24,7 @@
 	throwforce = 0
 	throw_range = 7
 	throw_speed = 3
-	materials = list(MAT_METAL=50, MAT_GLASS=20)
+	custom_materials = list(/datum/material/iron=50, /datum/material/glass=20)
 	var/obj/machinery/buffer // simple machine buffer for device linkage
 	toolspeed = 1
 	tool_behaviour = TOOL_MULTITOOL

code/game/objects/items/devices/pipe_painter.dm

@@ -6,7 +6,7 @@
 	item_flags = NOBLUDGEON
 	var/paint_color = "grey"
 
-	materials = list(MAT_METAL=5000, MAT_GLASS=2000)
+	custom_materials = list(/datum/material/iron=5000, /datum/material/glass=2000)
 
 /obj/item/pipe_painter/afterattack(atom/A, mob/user, proximity_flag)
 	. = ..()

code/game/objects/items/devices/powersink.dm

@@ -13,7 +13,7 @@
 	throwforce = 5
 	throw_speed = 1
 	throw_range = 2
-	materials = list(MAT_METAL=750)
+	custom_materials = list(/datum/material/iron=750)
 	var/drain_rate = 1600000	// amount of power to drain per tick
 	var/power_drained = 0 		// has drained this much power
 	var/max_power = 1e10		// maximum power that can be drained before exploding

code/game/objects/items/devices/radio/electropack.dm

@@ -9,7 +9,7 @@
 	flags_1 = CONDUCT_1
 	slot_flags = ITEM_SLOT_BACK
 	w_class = WEIGHT_CLASS_HUGE
-	materials = list(MAT_METAL=10000, MAT_GLASS=2500)
+	custom_materials = list(/datum/material/iron=10000, /datum/material/glass=2500)
 
 	var/code = 2
 	var/frequency = FREQ_ELECTROPACK
@@ -157,7 +157,7 @@ Code:
 	w_class = WEIGHT_CLASS_SMALL
 	strip_delay = 60
 	equip_delay_other = 60
-	materials = list(MAT_METAL=5000, MAT_GLASS=2000)
+	custom_materials = list(/datum/material/iron = 5000, /datum/material/glass = 2000)
 
 	var/tagname = null
 
@@ -166,7 +166,7 @@ Code:
 	id = "shockcollar"
 	build_type = AUTOLATHE
 	build_path = /obj/item/electropack/shockcollar
-	materials = list(MAT_METAL=5000, MAT_GLASS=2000)
+	materials = list(/datum/material/iron = 5000, /datum/material/glass =2000)
 	category = list("hacked", "Misc")
 
 /obj/item/electropack/shockcollar/attack_hand(mob/user)

code/game/objects/items/devices/radio/headset.dm

@@ -19,7 +19,7 @@ GLOBAL_LIST_INIT(channel_tokens, list(
 	desc = "An updated, modular intercom that fits over the head. Takes encryption keys."
 	icon_state = "headset"
 	item_state = "headset"
-	materials = list(MAT_METAL=75)
+	custom_materials = list(/datum/material/iron=75)
 	subspace_transmission = TRUE
 	canhear_range = 0 // can't hear headsets from very far away
 

code/game/objects/items/devices/radio/intercom.dm

@@ -147,4 +147,4 @@
 	result_path = /obj/item/radio/intercom/unscrewed
 	pixel_shift = 29
 	inverse = TRUE
-	materials = list(MAT_METAL = 75, MAT_GLASS = 25)
+	custom_materials = list(/datum/material/iron = 75, /datum/material/glass = 25)

code/game/objects/items/devices/radio/radio.dm

@@ -11,7 +11,7 @@
 	throw_speed = 3
 	throw_range = 7
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=75, MAT_GLASS=25)
+	custom_materials = list(/datum/material/iron=75, /datum/material/glass=25)
 	obj_flags = USES_TGUI
 
 	var/on = TRUE

code/game/objects/items/devices/scanners.dm

@@ -19,7 +19,7 @@ SLIME SCANNER
 	item_state = "electronic"
 	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
-	materials = list(MAT_METAL=150)
+	custom_materials = list(/datum/material/iron=150)
 
 /obj/item/t_scanner/suicide_act(mob/living/carbon/user)
 	user.visible_message("<span class='suicide'>[user] begins to emit terahertz-rays into [user.p_their()] brain with [src]! It looks like [user.p_theyre()] trying to commit suicide!</span>")
@@ -75,7 +75,7 @@ SLIME SCANNER
 	w_class = WEIGHT_CLASS_TINY
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL=200)
+	custom_materials = list(/datum/material/iron=200)
 	var/mode = 1
 	var/scanmode = 0
 	var/advanced = FALSE
@@ -518,7 +518,7 @@ SLIME SCANNER
 	throw_speed = 3
 	throw_range = 7
 	tool_behaviour = TOOL_ANALYZER
-	materials = list(MAT_METAL=30, MAT_GLASS=20)
+	custom_materials = list(/datum/material/iron=30, /datum/material/glass=20)
 	grind_results = list(/datum/reagent/mercury = 5, /datum/reagent/iron = 5, /datum/reagent/silicon = 5)
 	var/cooldown = FALSE
 	var/cooldown_time = 250
@@ -708,7 +708,7 @@ SLIME SCANNER
 	throwforce = 0
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL=30, MAT_GLASS=20)
+	custom_materials = list(/datum/material/iron=30, /datum/material/glass=20)
 
 /obj/item/slime_scanner/attack(mob/living/M, mob/living/user)
 	if(user.stat || user.eye_blind)
@@ -767,7 +767,7 @@ SLIME SCANNER
 	w_class = WEIGHT_CLASS_TINY
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL=200)
+	custom_materials = list(/datum/material/iron=200)
 
 /obj/item/nanite_scanner/attack(mob/living/M, mob/living/carbon/human/user)
 	user.visible_message("<span class='notice'>[user] has analyzed [M]'s nanites.</span>")

code/game/objects/items/devices/taperecorder.dm

@@ -9,7 +9,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	flags_1 = HEAR_1
 	slot_flags = ITEM_SLOT_BELT
-	materials = list(MAT_METAL=60, MAT_GLASS=30)
+	custom_materials = list(/datum/material/iron=60, /datum/material/glass=30)
 	force = 2
 	throwforce = 0
 	var/recording = 0
@@ -243,7 +243,7 @@
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_METAL=20, MAT_GLASS=5)
+	custom_materials = list(/datum/material/iron=20, /datum/material/glass=5)
 	force = 1
 	throwforce = 0
 	var/max_capacity = 600

code/game/objects/items/devices/traitordevices.dm

@@ -69,7 +69,7 @@ effective or pretty fucking useless.
 */
 
 /obj/item/healthanalyzer/rad_laser
-	materials = list(MAT_METAL=400)
+	custom_materials = list(/datum/material/iron=400)
 	var/irradiate = 1
 	var/intensity = 10 // how much damage the radiation does
 	var/wavelength = 10 // time it takes for the radiation to kick in, in seconds

code/game/objects/items/extinguisher.dm

@@ -11,7 +11,7 @@
 	throw_speed = 2
 	throw_range = 7
 	force = 10
-	materials = list(MAT_METAL = 90)
+	custom_materials = list(/datum/material/iron = 90)
 	attack_verb = list("slammed", "whacked", "bashed", "thunked", "battered", "bludgeoned", "thrashed")
 	dog_fashion = /datum/dog_fashion/back
 	resistance_flags = FIRE_PROOF
@@ -36,7 +36,7 @@
 	throwforce = 2
 	w_class = WEIGHT_CLASS_SMALL
 	force = 3
-	materials = list(MAT_METAL = 50, MAT_GLASS = 40)
+	custom_materials = list(/datum/material/iron = 50, /datum/material/glass = 40)
 	max_water = 30
 	sprite_name = "miniFE"
 	dog_fashion = null

code/game/objects/items/flamethrower.dm

@@ -12,7 +12,7 @@
 	throw_speed = 1
 	throw_range = 5
 	w_class = WEIGHT_CLASS_NORMAL
-	materials = list(MAT_METAL=500)
+	custom_materials = list(/datum/material/iron=500)
 	resistance_flags = FIRE_PROOF
 	var/status = FALSE
 	var/lit = FALSE	//on or off

code/game/objects/items/handcuffs.dm

@@ -36,7 +36,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	throw_speed = 3
 	throw_range = 5
-	materials = list(MAT_METAL=500)
+	custom_materials = list(/datum/material/iron=500)
 	breakouttime = 600 //Deciseconds = 60s = 1 minute
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 50)
 	var/cuffsound = 'sound/weapons/handcuffs.ogg'
@@ -117,7 +117,7 @@
 	color = "#ff0000"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
-	materials = list(MAT_METAL=150, MAT_GLASS=75)
+	custom_materials = list(/datum/material/iron=150, /datum/material/glass=75)
 	breakouttime = 300 //Deciseconds = 30s
 	cuffsound = 'sound/weapons/cablecuff.ogg'
 
@@ -202,7 +202,7 @@
 	item_state = "zipties"
 	lefthand_file = 'icons/mob/inhands/equipment/security_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/security_righthand.dmi'
-	materials = list()
+	custom_materials = null
 	breakouttime = 450 //Deciseconds = 45s
 	trashtype = /obj/item/restraints/handcuffs/cable/zipties/used
 	item_color = "white"

code/game/objects/items/implants/implantcase.dm

@@ -9,7 +9,7 @@
 	throw_speed = 2
 	throw_range = 5
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_GLASS=500)
+	custom_materials = list(/datum/material/glass=500)
 	var/obj/item/implant/imp = null
 	var/imp_type
 

code/game/objects/items/implants/implanter.dm

@@ -9,7 +9,7 @@
 	throw_speed = 3
 	throw_range = 5
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=600, MAT_GLASS=200)
+	custom_materials = list(/datum/material/iron=600, /datum/material/glass=200)
 	var/obj/item/implant/imp = null
 	var/imp_type = null
 

code/game/objects/items/kitchen.dm

@@ -22,7 +22,7 @@
 	throwforce = 0
 	throw_speed = 3
 	throw_range = 5
-	materials = list(MAT_METAL=80)
+	custom_materials = list(/datum/material/iron=80)
 	flags_1 = CONDUCT_1
 	attack_verb = list("attacked", "stabbed", "poked")
 	hitsound = 'sound/weapons/bladeslice.ogg'
@@ -65,7 +65,7 @@
 	hitsound = 'sound/weapons/bladeslice.ogg'
 	throw_speed = 3
 	throw_range = 6
-	materials = list(MAT_METAL=12000)
+	custom_materials = list(/datum/material/iron=12000)
 	attack_verb = list("slashed", "stabbed", "sliced", "torn", "ripped", "diced", "cut")
 	sharpness = IS_SHARP_ACCURATE
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 50)
@@ -104,7 +104,7 @@
 	flags_1 = CONDUCT_1
 	force = 15
 	throwforce = 10
-	materials = list(MAT_METAL=18000)
+	custom_materials = list(/datum/material/iron=18000)
 	attack_verb = list("cleaved", "slashed", "stabbed", "sliced", "torn", "ripped", "diced", "cut")
 	w_class = WEIGHT_CLASS_NORMAL
 
@@ -136,7 +136,7 @@
 	desc = "A sharpened bone. The bare minimum in survival."
 	force = 15
 	throwforce = 15
-	materials = list()
+	custom_materials = null
 
 /obj/item/kitchen/knife/combat/cyborg
 	name = "cyborg knife"
@@ -153,7 +153,7 @@
 	desc = "Unlike other carrots, you should probably keep this far away from your eyes."
 	force = 8
 	throwforce = 12//fuck git
-	materials = list()
+	custom_materials = null
 	attack_verb = list("shanked", "shivved")
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 0, "acid" = 0)
 

code/game/objects/items/melee/misc.dm

@@ -24,7 +24,7 @@
 	w_class = WEIGHT_CLASS_NORMAL
 	attack_verb = list("flogged", "whipped", "lashed", "disciplined")
 	hitsound = 'sound/weapons/chainhit.ogg'
-	materials = list(MAT_METAL = 1000)
+	custom_materials = list(/datum/material/iron = 1000)
 
 /obj/item/melee/chainofcommand/suicide_act(mob/user)
 	user.visible_message("<span class='suicide'>[user] is strangling [user.p_them()]self with [src]! It looks like [user.p_theyre()] trying to commit suicide!</span>")
@@ -67,7 +67,7 @@
 	sharpness = IS_SHARP
 	attack_verb = list("slashed", "cut")
 	hitsound = 'sound/weapons/rapierhit.ogg'
-	materials = list(MAT_METAL = 1000)
+	custom_materials = list(/datum/material/iron = 1000)
 	total_mass = 3.4
 
 /obj/item/melee/sabre/Initialize()
@@ -507,3 +507,29 @@
 	held_sausage.name = "[target.name]-roasted [held_sausage.name]"
 	held_sausage.desc = "[held_sausage.desc] It has been cooked to perfection on \a [target]."
 	update_icon()
+
+/obj/item/melee/cleric_mace
+	name = "cleric mace"
+	desc = "The grandson of the club, yet the grandfather of the baseball bat. Most notably used by holy orders in days past."
+	icon = 'icons/obj/items_and_weapons.dmi'
+	icon_state = "mace_greyscale"
+	item_state = "mace_greyscale"
+	lefthand_file = 'icons/mob/inhands/weapons/melee_lefthand.dmi'
+	righthand_file = 'icons/mob/inhands/weapons/melee_righthand.dmi'
+	material_flags = MATERIAL_ADD_PREFIX | MATERIAL_COLOR //Material type changes the prefix as well as the color.
+	custom_materials = list(/datum/material/iron = 12000)  //Defaults to an Iron Mace.
+	slot_flags = ITEM_SLOT_BELT
+	force = 14
+	w_class = WEIGHT_CLASS_BULKY
+	throwforce = 8
+	block_chance = 10
+	armour_penetration = 50
+	attack_verb = list("smacked", "struck", "cracked", "beaten")
+	var/overlay_state = "mace_handle"
+	var/mutable_appearance/overlay
+
+/obj/item/melee/cleric_mace/Initialize()
+	. = ..()
+	overlay = mutable_appearance(icon, overlay_state)
+	overlay.appearance_flags = RESET_COLOR
+	add_overlay(overlay)

code/game/objects/items/pet_carrier.dm

@@ -15,7 +15,7 @@
 	w_class = WEIGHT_CLASS_BULKY
 	throw_speed = 2
 	throw_range = 3
-	materials = list(MAT_METAL = 7500, MAT_GLASS = 100)
+	custom_materials = list(/datum/material/iron = 7500, /datum/material/glass = 100)
 	var/open = TRUE
 	var/locked = FALSE
 	var/list/occupants = list()

code/game/objects/items/pinpointer.dm

@@ -12,7 +12,7 @@
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL = 500, MAT_GLASS = 250)
+	custom_materials = list(/datum/material/iron = 500, /datum/material/glass = 250)
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | ACID_PROOF
 	var/active = FALSE
 	var/atom/movable/target //The thing we're searching for

code/game/objects/items/shields.dm

@@ -16,7 +16,7 @@
 	throw_speed = 2
 	throw_range = 3
 	w_class = WEIGHT_CLASS_BULKY
-	materials = list(MAT_GLASS=7500, MAT_METAL=1000)
+	custom_materials = list(/datum/material/glass=7500, /datum/material/iron=1000)
 	attack_verb = list("shoved", "bashed")
 	var/cooldown = 0 //shield bash cooldown. based on world.time
 
@@ -56,7 +56,7 @@
 	item_state = "buckler"
 	lefthand_file = 'icons/mob/inhands/equipment/shields_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/shields_righthand.dmi'
-	materials = list()
+	custom_materials = null
 	resistance_flags = FLAMMABLE
 	block_chance = 30
 
@@ -162,7 +162,7 @@
 	icon = 'icons/obj/items_and_weapons.dmi'
 	item_state = "metal"
 	icon_state = "makeshift_shield"
-	materials = list(MAT_METAL = 18000)
+	custom_materials = list(/datum/material/iron = 18000)
 	slot_flags = null
 	block_chance = 35
 	force = 10

code/game/objects/items/stacks/bscrystal.dm

@@ -6,7 +6,7 @@
 	icon_state = "bluespace_crystal"
 	singular_name = "bluespace crystal"
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_BLUESPACE=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/bluespace=MINERAL_MATERIAL_AMOUNT)
 	points = 50
 	var/blink_range = 8 // The teleport range when crushed/thrown at someone.
 	refined_type = /obj/item/stack/sheet/bluespace_crystal
@@ -49,7 +49,7 @@
 /obj/item/stack/ore/bluespace_crystal/artificial
 	name = "artificial bluespace crystal"
 	desc = "An artificially made bluespace crystal, it looks delicate."
-	materials = list(MAT_BLUESPACE=MINERAL_MATERIAL_AMOUNT*0.5)
+	custom_materials = list(/datum/material/bluespace=MINERAL_MATERIAL_AMOUNT*0.5)
 	blink_range = 4 // Not as good as the organic stuff!
 	points = 0 //nice try
 	refined_type = null
@@ -63,7 +63,7 @@
 	item_state = "sheet-polycrystal"
 	singular_name = "bluespace polycrystal"
 	desc = "A stable polycrystal, made of fused-together bluespace crystals. You could probably break one off."
-	materials = list(MAT_BLUESPACE=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/bluespace=MINERAL_MATERIAL_AMOUNT)
 	attack_verb = list("bluespace polybashed", "bluespace polybattered", "bluespace polybludgeoned", "bluespace polythrashed", "bluespace polysmashed")
 	novariants = TRUE
 	grind_results = list(/datum/reagent/bluespace = 20)

code/game/objects/items/stacks/medical.dm

@@ -126,7 +126,7 @@
 	heal_brute = 0
 
 /obj/item/stack/medical/gauze/cyborg
-	materials = list()
+	custom_materials = null
 	is_cyborg = 1
 	cost = 250
 

code/game/objects/items/stacks/rods.dm

@@ -16,7 +16,8 @@ GLOBAL_LIST_INIT(rod_recipes, list ( \
 	throwforce = 10
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL=1000)
+	custom_materials = list(/datum/material/iron=1000)
+	mats_per_stack = 1000
 	max_amount = 50
 	attack_verb = list("hit", "bludgeoned", "whacked")
 	hitsound = 'sound/weapons/grenadelaunch.ogg'
@@ -25,13 +26,15 @@ GLOBAL_LIST_INIT(rod_recipes, list ( \
 /obj/item/stack/rods/suicide_act(mob/living/carbon/user)
 	user.visible_message("<span class='suicide'>[user] begins to stuff \the [src] down [user.p_their()] throat! It looks like [user.p_theyre()] trying to commit suicide!</span>")//it looks like theyre ur mum
 	return BRUTELOSS
-	
+
 /obj/item/stack/rods/Initialize(mapload, new_amount, merge = TRUE)
 	. = ..()
-
-	recipes = GLOB.rod_recipes
 	update_icon()
 
+/obj/item/stack/rods/get_main_recipes()
+	. = ..()
+	. += GLOB.rod_recipes
+
 /obj/item/stack/rods/update_icon()
 	var/amount = get_amount()
 	if((amount <= 5) && (amount > 0))
@@ -70,7 +73,7 @@ GLOBAL_LIST_INIT(rod_recipes, list ( \
 		return ..()
 
 /obj/item/stack/rods/cyborg
-	materials = list()
+	custom_materials = null
 	is_cyborg = 1
 	cost = 250
 

code/game/objects/items/stacks/sheets/glass.dm

@@ -27,11 +27,12 @@ GLOBAL_LIST_INIT(glass_recipes, list ( \
 	singular_name = "glass sheet"
 	icon_state = "sheet-glass"
 	item_state = "sheet-glass"
-	materials = list(MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 100)
 	resistance_flags = ACID_PROOF
 	merge_type = /obj/item/stack/sheet/glass
 	grind_results = list(/datum/reagent/silicon = 20)
+	material_type = /datum/material/glass
 	point_value = 1
 	tableVariant = /obj/structure/table/glass
 	shard_type = /obj/item/shard
@@ -41,7 +42,7 @@ GLOBAL_LIST_INIT(glass_recipes, list ( \
 	return BRUTELOSS
 
 /obj/item/stack/sheet/glass/cyborg
-	materials = list()
+	custom_materials = null
 	is_cyborg = 1
 	cost = 500
 
@@ -51,9 +52,9 @@ GLOBAL_LIST_INIT(glass_recipes, list ( \
 /obj/item/stack/sheet/glass/five
 	amount = 5
 
-/obj/item/stack/sheet/glass/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.glass_recipes
-	return ..()
+/obj/item/stack/sheet/glass/get_main_recipes()
+	. = ..()
+	. += GLOB.glass_recipes
 
 /obj/item/stack/sheet/glass/attackby(obj/item/W, mob/user, params)
 	add_fingerprint(user)
@@ -96,20 +97,21 @@ GLOBAL_LIST_INIT(pglass_recipes, list ( \
 	singular_name = "plasma glass sheet"
 	icon_state = "sheet-pglass"
 	item_state = "sheet-pglass"
-	materials = list(MAT_PLASMA=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plasma=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 75, "acid" = 100)
 	resistance_flags = ACID_PROOF
 	merge_type = /obj/item/stack/sheet/plasmaglass
 	grind_results = list(/datum/reagent/silicon = 20, /datum/reagent/toxin/plasma = 10)
 	tableVariant = /obj/structure/table/plasmaglass
+	material_flags = MATERIAL_NO_EFFECTS
 	shard_type = /obj/item/shard/plasma
 
 /obj/item/stack/sheet/plasmaglass/fifty
 	amount = 50
 
-/obj/item/stack/sheet/plasmaglass/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.pglass_recipes
-	return ..()
+/obj/item/stack/sheet/plasmaglass/get_main_recipes()
+	. = ..()
+	. += GLOB.pglass_recipes
 
 /obj/item/stack/sheet/plasmaglass/attackby(obj/item/W, mob/user, params)
 	add_fingerprint(user)
@@ -151,7 +153,7 @@ GLOBAL_LIST_INIT(reinforced_glass_recipes, list ( \
 	singular_name = "reinforced glass sheet"
 	icon_state = "sheet-rglass"
 	item_state = "sheet-rglass"
-	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 70, "acid" = 100)
 	resistance_flags = ACID_PROOF
 	merge_type = /obj/item/stack/sheet/rglass
@@ -167,7 +169,7 @@ GLOBAL_LIST_INIT(reinforced_glass_recipes, list ( \
 	S.obj_integrity *= 2
 
 /obj/item/stack/sheet/rglass/cyborg
-	materials = list()
+	custom_materials = null
 	var/datum/robot_energy_storage/glasource
 	var/metcost = 250
 	var/glacost = 500
@@ -183,9 +185,9 @@ GLOBAL_LIST_INIT(reinforced_glass_recipes, list ( \
 	source.add_charge(amount * metcost)
 	glasource.add_charge(amount * glacost)
 
-/obj/item/stack/sheet/rglass/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.reinforced_glass_recipes
-	return ..()
+/obj/item/stack/sheet/rglass/get_main_recipes()
+	. = ..()
+	. += GLOB.reinforced_glass_recipes
 
 GLOBAL_LIST_INIT(prglass_recipes, list ( \
 	new/datum/stack_recipe("directional reinforced window", /obj/structure/window/plasma/reinforced/unanchored, time = 0, on_floor = TRUE, window_checks = TRUE), \
@@ -198,14 +200,18 @@ GLOBAL_LIST_INIT(prglass_recipes, list ( \
 	singular_name = "reinforced plasma glass sheet"
 	icon_state = "sheet-prglass"
 	item_state = "sheet-prglass"
-	materials = list(MAT_PLASMA=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT, MAT_METAL=MINERAL_MATERIAL_AMOUNT * 0.5,)
+	custom_materials = list(/datum/material/plasma=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT, /datum/material/iron=MINERAL_MATERIAL_AMOUNT * 0.5,)
 	armor = list("melee" = 20, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 80, "acid" = 100)
 	resistance_flags = ACID_PROOF
+	material_flags = MATERIAL_NO_EFFECTS
 	merge_type = /obj/item/stack/sheet/plasmarglass
 	grind_results = list(/datum/reagent/silicon = 20, /datum/reagent/toxin/plasma = 10, /datum/reagent/iron = 10)
 	point_value = 23
 	shard_type = /obj/item/shard/plasma
 
+/obj/item/stack/sheet/plasmarglass/get_main_recipes()
+	. = ..()
+	. += GLOB.prglass_recipes
 /obj/item/stack/sheet/plasmarglass/on_solar_construction(obj/machinery/power/solar/S)
 	S.obj_integrity *= 2.2
 	S.efficiency *= 1.2
@@ -224,12 +230,16 @@ GLOBAL_LIST_INIT(titaniumglass_recipes, list(
 	singular_name = "titanium glass sheet"
 	icon_state = "sheet-titaniumglass"
 	item_state = "sheet-titaniumglass"
-	materials = list(MAT_TITANIUM=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/titanium=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 80, "acid" = 100)
 	resistance_flags = ACID_PROOF
 	merge_type = /obj/item/stack/sheet/titaniumglass
 	shard_type = /obj/item/shard
 
+/obj/item/stack/sheet/titaniumglass/get_main_recipes()
+	. = ..()
+	. += GLOB.titaniumglass_recipes
+
 /obj/item/stack/sheet/titaniumglass/on_solar_construction(obj/machinery/power/solar/S)
 	S.obj_integrity *= 2.5
 	S.efficiency *= 1.5
@@ -248,15 +258,16 @@ GLOBAL_LIST_INIT(plastitaniumglass_recipes, list(
 	singular_name = "plastitanium glass sheet"
 	icon_state = "sheet-plastitaniumglass"
 	item_state = "sheet-plastitaniumglass"
-	materials = list(MAT_TITANIUM=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_PLASMA=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/titanium=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/plasma=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 80, "acid" = 100)
+	material_flags = MATERIAL_NO_EFFECTS
 	resistance_flags = ACID_PROOF
 	merge_type = /obj/item/stack/sheet/plastitaniumglass
 	shard_type = /obj/item/shard
 
-/obj/item/stack/sheet/plastitaniumglass/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.plastitaniumglass_recipes
-	return ..()
+/obj/item/stack/sheet/plastitaniumglass/get_main_recipes()
+	. = ..()
+	. += GLOB.plastitaniumglass_recipes
 
 /obj/item/stack/sheet/titaniumglass/on_solar_construction(obj/machinery/power/solar/S)
 	S.obj_integrity *= 2
@@ -273,7 +284,7 @@ GLOBAL_LIST_INIT(plastitaniumglass_recipes, list(
 	item_state = "shard-glass"
 	lefthand_file = 'icons/mob/inhands/weapons/melee_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/weapons/melee_righthand.dmi'
-	materials = list(MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	attack_verb = list("stabbed", "slashed", "sliced", "cut")
 	hitsound = 'sound/weapons/bladeslice.ogg'
 	resistance_flags = ACID_PROOF
@@ -372,5 +383,5 @@ GLOBAL_LIST_INIT(plastitaniumglass_recipes, list(
 	force = 6
 	throwforce = 11
 	icon_state = "plasmalarge"
-	materials = list(MAT_PLASMA=MINERAL_MATERIAL_AMOUNT * 0.5, MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plasma=MINERAL_MATERIAL_AMOUNT * 0.5, /datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	icon_prefix = "plasma"

code/game/objects/items/stacks/sheets/leather.dm

@@ -15,9 +15,9 @@ GLOBAL_LIST_INIT(human_recipes, list( \
 	new/datum/stack_recipe("bloated human costume", /obj/item/clothing/suit/hooded/bloated_human, 5), \
 	))
 
-/obj/item/stack/sheet/animalhide/human/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.human_recipes
-	return ..()
+/obj/item/stack/sheet/animalhide/human/get_main_recipes()
+	. = ..()
+	. += GLOB.human_recipes
 
 /obj/item/stack/sheet/animalhide/generic
 	name = "skin"
@@ -46,17 +46,17 @@ GLOBAL_LIST_INIT(gondola_recipes, list ( \
 	icon_state = "sheet-gondola"
 	item_state = "sheet-gondola"
 
-/obj/item/stack/sheet/animalhide/gondola/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.gondola_recipes
-	return ..()
+/obj/item/stack/sheet/animalhide/gondola/get_main_recipes()
+	. = ..()
+	. += GLOB.gondola_recipes
 
 GLOBAL_LIST_INIT(corgi_recipes, list ( \
 	new/datum/stack_recipe("corgi costume", /obj/item/clothing/suit/hooded/ian_costume, 3), \
 	))
 
-/obj/item/stack/sheet/animalhide/corgi/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.corgi_recipes
-	return ..()
+/obj/item/stack/sheet/animalhide/corgi/get_main_recipes()
+	. = ..()
+	. += GLOB.corgi_recipes
 
 /obj/item/stack/sheet/animalhide/cat
 	name = "cat hide"
@@ -77,9 +77,9 @@ GLOBAL_LIST_INIT(monkey_recipes, list ( \
 	new/datum/stack_recipe("monkey suit", /obj/item/clothing/suit/monkeysuit, 2), \
 	))
 
-/obj/item/stack/sheet/animalhide/monkey/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.monkey_recipes
-	return ..()
+/obj/item/stack/sheet/animalhide/monkey/get_main_recipes()
+	. = ..()
+	. += GLOB.monkey_recipes
 
 /obj/item/stack/sheet/animalhide/lizard
 	name = "lizard skin"
@@ -100,9 +100,9 @@ GLOBAL_LIST_INIT(xeno_recipes, list ( \
 	new/datum/stack_recipe("alien suit", /obj/item/clothing/suit/xenos, 2), \
 	))
 
-/obj/item/stack/sheet/animalhide/xeno/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.xeno_recipes
-	return ..()
+/obj/item/stack/sheet/animalhide/xeno/get_main_recipes()
+	. = ..()
+	. += GLOB.xeno_recipes
 
 //don't see anywhere else to put these, maybe together they could be used to make the xenos suit?
 /obj/item/stack/sheet/xenochitin
@@ -163,9 +163,9 @@ GLOBAL_LIST_INIT(leather_recipes, list ( \
 	new/datum/stack_recipe("leather overcoat", /obj/item/clothing/suit/jacket/leather/overcoat, 10), \
 ))
 
-/obj/item/stack/sheet/leather/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.leather_recipes
-	return ..()
+/obj/item/stack/sheet/leather/get_main_recipes()
+	. = ..()
+	. += GLOB.leather_recipes
 
 /*
  * Sinew
@@ -183,9 +183,9 @@ GLOBAL_LIST_INIT(sinew_recipes, list ( \
 	new/datum/stack_recipe("sinew restraints", /obj/item/restraints/handcuffs/sinew, 1), \
 ))
 
-/obj/item/stack/sheet/sinew/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.sinew_recipes
-	return ..()
+/obj/item/stack/sheet/sinew/get_main_recipes()
+	. = ..()
+	. += GLOB.sinew_recipes
 
 		/*
  * Plates

code/game/objects/items/stacks/sheets/mineral.dm

@@ -19,11 +19,6 @@ Mineral Sheets
 		- Coal
 */
 
-/obj/item/stack/sheet/mineral/Initialize(mapload)
-	pixel_x = rand(-4, 4)
-	pixel_y = rand(-4, 4)
-	. = ..()
-
 /*
  * Sandstone
  */
@@ -44,13 +39,13 @@ GLOBAL_LIST_INIT(sandstone_recipes, list ( \
 	item_state = "sheet-sandstone"
 	throw_speed = 3
 	throw_range = 5
-	materials = list(MAT_GLASS=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass=MINERAL_MATERIAL_AMOUNT)
 	sheettype = "sandstone"
 	merge_type = /obj/item/stack/sheet/mineral/sandstone
 
-/obj/item/stack/sheet/mineral/sandstone/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.sandstone_recipes
+/obj/item/stack/sheet/mineral/sandstone/get_main_recipes()
 	. = ..()
+	. += GLOB.sandstone_recipes
 
 /obj/item/stack/sheet/mineral/sandstone/thirty
 	amount = 30
@@ -74,9 +69,9 @@ GLOBAL_LIST_INIT(sandbag_recipes, list ( \
 	new/datum/stack_recipe("sandbags", /obj/structure/barricade/sandbags, 1, time = 25, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/sandbags/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.sandbag_recipes
+/obj/item/stack/sheet/mineral/sandbags/get_main_recipes()
 	. = ..()
+	. += GLOB.sandbag_recipes
 
 /obj/item/emptysandbag
 	name = "empty sandbag"
@@ -106,11 +101,12 @@ GLOBAL_LIST_INIT(sandbag_recipes, list ( \
 	item_state = "sheet-diamond"
 	singular_name = "diamond"
 	sheettype = "diamond"
-	materials = list(MAT_DIAMOND=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/diamond=MINERAL_MATERIAL_AMOUNT)
 	novariants = TRUE
 	grind_results = list(/datum/reagent/carbon = 20)
 	point_value = 25
 	merge_type = /obj/item/stack/sheet/mineral/diamond
+	material_type = /datum/material/diamond
 
 GLOBAL_LIST_INIT(diamond_recipes, list ( \
 	new/datum/stack_recipe("diamond door", /obj/structure/mineral_door/transparent/diamond, 10, one_per_turf = 1, on_floor = 1), \
@@ -120,9 +116,9 @@ GLOBAL_LIST_INIT(diamond_recipes, list ( \
 	new/datum/stack_recipe("AI Core Statue", /obj/structure/statue/diamond/ai2, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/diamond/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.diamond_recipes
+/obj/item/stack/sheet/mineral/diamond/get_main_recipes()
 	. = ..()
+	. += GLOB.diamond_recipes
 
 /*
  * Uranium
@@ -133,11 +129,12 @@ GLOBAL_LIST_INIT(diamond_recipes, list ( \
 	item_state = "sheet-uranium"
 	singular_name = "uranium sheet"
 	sheettype = "uranium"
-	materials = list(MAT_URANIUM=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/uranium=MINERAL_MATERIAL_AMOUNT)
 	novariants = TRUE
 	grind_results = list(/datum/reagent/uranium = 20)
 	point_value = 20
 	merge_type = /obj/item/stack/sheet/mineral/uranium
+	material_type = /datum/material/uranium
 
 GLOBAL_LIST_INIT(uranium_recipes, list ( \
 	new/datum/stack_recipe("uranium door", /obj/structure/mineral_door/uranium, 10, one_per_turf = 1, on_floor = 1), \
@@ -146,9 +143,9 @@ GLOBAL_LIST_INIT(uranium_recipes, list ( \
 	new/datum/stack_recipe("Engineer Statue", /obj/structure/statue/uranium/eng, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/uranium/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.uranium_recipes
+/obj/item/stack/sheet/mineral/uranium/get_main_recipes()
 	. = ..()
+	. += GLOB.uranium_recipes
 
 /*
  * Plasma
@@ -161,10 +158,11 @@ GLOBAL_LIST_INIT(uranium_recipes, list ( \
 	sheettype = "plasma"
 	resistance_flags = FLAMMABLE
 	max_integrity = 100
-	materials = list(MAT_PLASMA=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plasma=MINERAL_MATERIAL_AMOUNT)
 	grind_results = list(/datum/reagent/toxin/plasma = 20)
 	point_value = 20
 	merge_type = /obj/item/stack/sheet/mineral/plasma
+	material_type = /datum/material/plasma
 
 /obj/item/stack/sheet/mineral/plasma/suicide_act(mob/living/carbon/user)
 	user.visible_message("<span class='suicide'>[user] begins licking \the [src]! It looks like [user.p_theyre()] trying to commit suicide!</span>")
@@ -176,9 +174,9 @@ GLOBAL_LIST_INIT(plasma_recipes, list ( \
 	new/datum/stack_recipe("Scientist Statue", /obj/structure/statue/plasma/scientist, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/plasma/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.plasma_recipes
+/obj/item/stack/sheet/mineral/plasma/get_main_recipes()
 	. = ..()
+	. += GLOB.plasma_recipes
 
 /obj/item/stack/sheet/mineral/plasma/attackby(obj/item/W as obj, mob/user as mob, params)
 	if(W.get_temperature() > 300)//If the temperature of the object is over 300, then ignite
@@ -202,10 +200,11 @@ GLOBAL_LIST_INIT(plasma_recipes, list ( \
 	item_state = "sheet-gold"
 	singular_name = "gold bar"
 	sheettype = "gold"
-	materials = list(MAT_GOLD=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/gold=MINERAL_MATERIAL_AMOUNT)
 	grind_results = list(/datum/reagent/gold = 20)
 	point_value = 20
 	merge_type = /obj/item/stack/sheet/mineral/gold
+	material_type = /datum/material/gold
 
 GLOBAL_LIST_INIT(gold_recipes, list ( \
 	new/datum/stack_recipe("golden door", /obj/structure/mineral_door/gold, 10, one_per_turf = 1, on_floor = 1), \
@@ -218,9 +217,9 @@ GLOBAL_LIST_INIT(gold_recipes, list ( \
 	new/datum/stack_recipe("CMO Statue", /obj/structure/statue/gold/cmo, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/gold/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.gold_recipes
+/obj/item/stack/sheet/mineral/gold/get_main_recipes()
 	. = ..()
+	. += GLOB.gold_recipes
 
 /*
  * Silver
@@ -231,10 +230,11 @@ GLOBAL_LIST_INIT(gold_recipes, list ( \
 	item_state = "sheet-silver"
 	singular_name = "silver bar"
 	sheettype = "silver"
-	materials = list(MAT_SILVER=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/silver=MINERAL_MATERIAL_AMOUNT)
 	grind_results = list(/datum/reagent/silver = 20)
 	point_value = 20
 	merge_type = /obj/item/stack/sheet/mineral/silver
+	material_type = /datum/material/silver
 	tableVariant = /obj/structure/table/optable
 
 GLOBAL_LIST_INIT(silver_recipes, list ( \
@@ -247,9 +247,9 @@ GLOBAL_LIST_INIT(silver_recipes, list ( \
 	new/datum/stack_recipe("Med Borg Statue", /obj/structure/statue/silver/medborg, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/silver/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.silver_recipes
+/obj/item/stack/sheet/mineral/silver/get_main_recipes()
 	. = ..()
+	. += GLOB.silver_recipes
 
 /*
  * Clown
@@ -260,20 +260,21 @@ GLOBAL_LIST_INIT(silver_recipes, list ( \
 	item_state = "sheet-bananium"
 	singular_name = "bananium sheet"
 	sheettype = "bananium"
-	materials = list(MAT_BANANIUM=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/bananium=MINERAL_MATERIAL_AMOUNT)
 	novariants = TRUE
 	grind_results = list(/datum/reagent/consumable/banana = 20)
 	point_value = 50
 	merge_type = /obj/item/stack/sheet/mineral/bananium
+	material_type = /datum/material/bananium
 
 GLOBAL_LIST_INIT(bananium_recipes, list ( \
 	new/datum/stack_recipe("bananium tile", /obj/item/stack/tile/mineral/bananium, 1, 4, 20), \
 	new/datum/stack_recipe("Clown Statue", /obj/structure/statue/bananium/clown, 5, one_per_turf = 1, on_floor = 1), \
 	))
 
-/obj/item/stack/sheet/mineral/bananium/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.bananium_recipes
+/obj/item/stack/sheet/mineral/bananium/get_main_recipes()
 	. = ..()
+	. += GLOB.bananium_recipes
 
 /*
  * Titanium
@@ -289,17 +290,18 @@ GLOBAL_LIST_INIT(bananium_recipes, list ( \
 	throw_speed = 1
 	throw_range = 3
 	sheettype = "titanium"
-	materials = list(MAT_TITANIUM=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/titanium=MINERAL_MATERIAL_AMOUNT)
 	point_value = 20
 	merge_type = /obj/item/stack/sheet/mineral/titanium
+	material_type = /datum/material/titanium
 
 GLOBAL_LIST_INIT(titanium_recipes, list ( \
 	new/datum/stack_recipe("titanium tile", /obj/item/stack/tile/mineral/titanium, 1, 4, 20), \
 	))
 
-/obj/item/stack/sheet/mineral/titanium/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.titanium_recipes
+/obj/item/stack/sheet/mineral/titanium/get_main_recipes()
 	. = ..()
+	. += GLOB.titanium_recipes
 
 /obj/item/stack/sheet/mineral/titanium/fifty
 	amount = 50
@@ -319,17 +321,18 @@ GLOBAL_LIST_INIT(titanium_recipes, list ( \
 	throw_speed = 1
 	throw_range = 3
 	sheettype = "plastitanium"
-	materials = list(MAT_TITANIUM=MINERAL_MATERIAL_AMOUNT, MAT_PLASMA=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/titanium=MINERAL_MATERIAL_AMOUNT, /datum/material/plasma=MINERAL_MATERIAL_AMOUNT)
 	point_value = 45
 	merge_type = /obj/item/stack/sheet/mineral/plastitanium
+	material_flags = MATERIAL_NO_EFFECTS
 
 GLOBAL_LIST_INIT(plastitanium_recipes, list ( \
 	new/datum/stack_recipe("plastitanium tile", /obj/item/stack/tile/mineral/plastitanium, 1, 4, 20), \
 	))
 
-/obj/item/stack/sheet/mineral/plastitanium/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.plastitanium_recipes
+/obj/item/stack/sheet/mineral/plastitanium/get_main_recipes()
 	. = ..()
+	. += GLOB.plastitanium_recipes
 
 /****************************** Others ****************************/
 
@@ -345,11 +348,26 @@ GLOBAL_LIST_INIT(adamantine_recipes, list(
 	icon_state = "sheet-adamantine"
 	item_state = "sheet-adamantine"
 	singular_name = "adamantine sheet"
+	custom_materials = list(/datum/material/adamantine=MINERAL_MATERIAL_AMOUNT)
 	merge_type = /obj/item/stack/sheet/mineral/adamantine
 
-/obj/item/stack/sheet/mineral/adamantine/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.adamantine_recipes
+/obj/item/stack/sheet/mineral/adamantine/get_main_recipes()
 	. = ..()
+	. += GLOB.adamantine_recipes
+
+/*
+ * Runite
+ */
+
+/obj/item/stack/sheet/mineral/runite
+	name = "Runite"
+	desc = "Rare material found in distant lands."
+	singular_name = "runite bar"
+	icon_state = "sheet-runite"
+	item_state = "sheet-runite"
+	custom_materials = list(/datum/material/runite=MINERAL_MATERIAL_AMOUNT)
+	merge_type = /obj/item/stack/sheet/mineral/runite
+	material_type = /datum/material/runite
 
 /*
  * Mythril
@@ -360,6 +378,7 @@ GLOBAL_LIST_INIT(adamantine_recipes, list(
 	item_state = "sheet-mythril"
 	singular_name = "mythril sheet"
 	novariants = TRUE
+	custom_materials = list(/datum/material/mythril=MINERAL_MATERIAL_AMOUNT)
 	merge_type = /obj/item/stack/sheet/mineral/mythril
 
 /*
@@ -381,9 +400,9 @@ GLOBAL_LIST_INIT(snow_recipes, list ( \
 	new/datum/stack_recipe("Snowball", /obj/item/toy/snowball, 1), \
 	))
 
-/obj/item/stack/sheet/mineral/snow/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.snow_recipes
+/obj/item/stack/sheet/mineral/snow/get_main_recipes()
 	. = ..()
+	. += GLOB.snow_recipes
 
 /*
  * Alien Alloy
@@ -406,9 +425,9 @@ GLOBAL_LIST_INIT(abductor_recipes, list ( \
 	new/datum/stack_recipe("alien floor tile", /obj/item/stack/tile/mineral/abductor, 1, 4, 20), \
 	))
 
-/obj/item/stack/sheet/mineral/abductor/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.abductor_recipes
+/obj/item/stack/sheet/mineral/abductor/get_main_recipes()
 	. = ..()
+	. += GLOB.abductor_recipes
 
 /*
  * Coal

code/game/objects/items/stacks/sheets/sheet_types.dm

@@ -24,7 +24,6 @@
 GLOBAL_LIST_INIT(metal_recipes, list ( \
 	new/datum/stack_recipe("stool", /obj/structure/chair/stool, one_per_turf = TRUE, on_floor = TRUE), \
 	new/datum/stack_recipe("bar stool", /obj/structure/chair/stool/bar, one_per_turf = TRUE, on_floor = TRUE), \
-	new/datum/stack_recipe("chair", /obj/structure/chair, one_per_turf = TRUE, on_floor = TRUE), \
 	new/datum/stack_recipe("bed", /obj/structure/bed, 2, one_per_turf = TRUE, on_floor = TRUE), \
 	//CIT CHANGE - adds sofas to metal recipe list
 	new/datum/stack_recipe_list("sofas", list( \
@@ -106,14 +105,14 @@ GLOBAL_LIST_INIT(metal_recipes, list ( \
 	singular_name = "metal sheet"
 	icon_state = "sheet-metal"
 	item_state = "sheet-metal"
-	materials = list(MAT_METAL=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron=MINERAL_MATERIAL_AMOUNT)
 	throwforce = 10
 	flags_1 = CONDUCT_1
 	resistance_flags = FIRE_PROOF
 	merge_type = /obj/item/stack/sheet/metal
 	grind_results = list(/datum/reagent/iron = 20)
 	point_value = 2
-	tableVariant = /obj/structure/table
+	material_type = /datum/material/iron
 
 /obj/item/stack/sheet/metal/ratvar_act()
 	new /obj/item/stack/tile/brass(loc, amount)
@@ -136,13 +135,13 @@ GLOBAL_LIST_INIT(metal_recipes, list ( \
 	amount = 5
 
 /obj/item/stack/sheet/metal/cyborg
-	materials = list()
+	custom_materials = null
 	is_cyborg = 1
 	cost = 500
 
-/obj/item/stack/sheet/metal/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.metal_recipes
-	return ..()
+/obj/item/stack/sheet/metal/get_main_recipes()
+	. = ..()
+	. += GLOB.metal_recipes
 
 /obj/item/stack/sheet/metal/suicide_act(mob/living/carbon/user)
 	user.visible_message("<span class='suicide'>[user] begins whacking [user.p_them()]self over the head with \the [src]! It looks like [user.p_theyre()] trying to commit suicide!</span>")
@@ -167,7 +166,7 @@ GLOBAL_LIST_INIT(plasteel_recipes, list ( \
 	desc = "This sheet is an alloy of iron and plasma."
 	icon_state = "sheet-plasteel"
 	item_state = "sheet-metal"
-	materials = list(MAT_METAL=2000, MAT_PLASMA=2000)
+	custom_materials = list(/datum/material/iron=2000, /datum/material/plasma=2000)
 	throwforce = 10
 	flags_1 = CONDUCT_1
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 80)
@@ -176,10 +175,11 @@ GLOBAL_LIST_INIT(plasteel_recipes, list ( \
 	grind_results = list(/datum/reagent/iron = 20, /datum/reagent/toxin/plasma = 20)
 	point_value = 23
 	tableVariant = /obj/structure/table/reinforced
+	material_flags = MATERIAL_NO_EFFECTS
 
-/obj/item/stack/sheet/plasteel/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.plasteel_recipes
-	return ..()
+/obj/item/stack/sheet/plasteel/get_main_recipes()
+	. = ..()
+	. += GLOB.plasteel_recipes
 
 /obj/item/stack/sheet/plasteel/twenty
 	amount = 20
@@ -273,9 +273,9 @@ GLOBAL_LIST_INIT(wood_recipes, list ( \
 	else
 		. = ..()
 
-/obj/item/stack/sheet/mineral/wood/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.wood_recipes
-	return ..()
+/obj/item/stack/sheet/mineral/wood/get_main_recipes()
+	. = ..()
+	. += GLOB.wood_recipes
 
 /obj/item/stack/sheet/mineral/wood/twenty
 	amount = 20
@@ -361,9 +361,9 @@ GLOBAL_LIST_INIT(cloth_recipes, list ( \
 	loom_result = /obj/item/stack/sheet/silk
 	merge_type = /obj/item/stack/sheet/cloth
 
-/obj/item/stack/sheet/cloth/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.cloth_recipes
-	return ..()
+/obj/item/stack/sheet/cloth/get_main_recipes()
+	. = ..()
+	. += GLOB.cloth_recipes
 
 /obj/item/stack/sheet/cloth/ten
 	amount = 10
@@ -408,9 +408,9 @@ GLOBAL_LIST_INIT(cloth_recipes, list ( \
 	throwforce = 0
 	merge_type = /obj/item/stack/sheet/durathread
 
-/obj/item/stack/sheet/durathread/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.durathread_recipes
-	return ..()
+/obj/item/stack/sheet/durathread/get_main_recipes()
+	. = ..()
+	. += GLOB.durathread_recipes
 
 /*
  * Cardboard
@@ -487,9 +487,9 @@ GLOBAL_LIST_INIT(cardboard_recipes, list ( \
 	merge_type = /obj/item/stack/sheet/cardboard
 	novariants = TRUE
 
-/obj/item/stack/sheet/cardboard/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.cardboard_recipes
-	return ..()
+/obj/item/stack/sheet/cardboard/get_main_recipes()
+	. = ..()
+	. += GLOB.cardboard_recipes
 
 /obj/item/stack/sheet/cardboard/fifty
 	amount = 50
@@ -545,9 +545,9 @@ GLOBAL_LIST_INIT(runed_metal_recipes, list ( \
 		return FALSE
 	return ..()
 
-/obj/item/stack/sheet/runed_metal/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.runed_metal_recipes
-	return ..()
+/obj/item/stack/sheet/runed_metal/get_main_recipes()
+	. = ..()
+	. += GLOB.runed_metal_recipes
 
 /obj/item/stack/sheet/runed_metal/fifty
 	amount = 50
@@ -617,11 +617,9 @@ GLOBAL_LIST_INIT(brass_recipes, list ( \
 		return
 	..()
 
-/obj/item/stack/tile/brass/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.brass_recipes
+/obj/item/stack/tile/brass/get_main_recipes()
 	. = ..()
-	pixel_x = 0
-	pixel_y = 0
+	. += GLOB.brass_recipes
 
 /obj/item/stack/tile/brass/fifty
 	amount = 50
@@ -665,11 +663,9 @@ GLOBAL_LIST_INIT(bronze_recipes, list ( \
 		to_chat(user, "<span class='danger'>Wha... what is this cheap imitation crap? This isn't brass at all!</span>")
 	..()
 
-/obj/item/stack/tile/bronze/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.bronze_recipes
+/obj/item/stack/tile/bronze/get_main_recipes()
 	. = ..()
-	pixel_x = 0
-	pixel_y = 0
+	. += GLOB.bronze_recipes
 
 /obj/item/stack/tile/bronze/thirty
 	amount = 30
@@ -727,7 +723,7 @@ GLOBAL_LIST_INIT(plastic_recipes, list(
 	singular_name = "plastic sheet"
 	icon_state = "sheet-plastic"
 	item_state = "sheet-plastic"
-	materials = list(MAT_PLASTIC=MINERAL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plastic=MINERAL_MATERIAL_AMOUNT)
 	throwforce = 7
 	grind_results = list(/datum/reagent/glitter/white = 60)
 	merge_type = /obj/item/stack/sheet/plastic
@@ -738,9 +734,9 @@ GLOBAL_LIST_INIT(plastic_recipes, list(
 /obj/item/stack/sheet/plastic/five
 	amount = 5
 
-/obj/item/stack/sheet/plastic/Initialize(mapload, new_amount, merge = TRUE)
-	recipes = GLOB.plastic_recipes
+/obj/item/stack/sheet/plastic/get_main_recipes()
 	. = ..()
+	. += GLOB.plastic_recipes
 
 GLOBAL_LIST_INIT(paperframe_recipes, list(
 new /datum/stack_recipe("paper frame separator", /obj/structure/window/paperframe, 2, one_per_turf = TRUE, on_floor = TRUE, time = 10), \
@@ -756,9 +752,10 @@ new /datum/stack_recipe("paper frame door", /obj/structure/mineral_door/paperfra
 	resistance_flags = FLAMMABLE
 	merge_type = /obj/item/stack/sheet/paperframes
 
-/obj/item/stack/sheet/paperframes/Initialize()
-	recipes = GLOB.paperframe_recipes
+/obj/item/stack/sheet/paperframes/get_main_recipes()
 	. = ..()
+	. += GLOB.paperframe_recipes
+
 /obj/item/stack/sheet/paperframes/five
 	amount = 5
 /obj/item/stack/sheet/paperframes/twenty

code/game/objects/items/stacks/sheets/sheets.dm

@@ -10,7 +10,7 @@
 	throw_range = 3
 	attack_verb = list("bashed", "battered", "bludgeoned", "thrashed", "smashed")
 	novariants = FALSE
-	var/perunit = MINERAL_MATERIAL_AMOUNT
+	mats_per_stack = MINERAL_MATERIAL_AMOUNT
 	var/sheettype = null //this is used for girders in the creation of walls/false walls
 	var/point_value = 0 //turn-in value for the gulag stacker - loosely relative to its rarity
 	var/is_fabric = FALSE //is this  a valid material for the loom?
@@ -18,6 +18,11 @@
 	var/pull_effort = 0 //amount of delay when pulling on the loom
 	var/shard_type // the shard debris typepath left over by solar panels and windows etc.
 
+/obj/item/stack/sheet/Initialize(mapload, new_amount, merge)
+	. = ..()
+	pixel_x = rand(-4, 4)
+	pixel_y = rand(-4, 4)
+
 /**
   * Called on the glass sheet upon solar construction (duh):
   * Different glass sheets can modify different stas/vars, such as obj_integrity or efficiency

code/game/objects/items/stacks/stack.dm

@@ -11,6 +11,7 @@
 /obj/item/stack
 	icon = 'icons/obj/stack_objects.dmi'
 	gender = PLURAL
+	material_modifier = 0.01
 	var/list/datum/stack_recipe/recipes
 	var/singular_name
 	var/amount = 1
@@ -21,6 +22,9 @@
 	var/merge_type = null // This path and its children should merge with this stack, defaults to src.type
 	var/full_w_class = WEIGHT_CLASS_NORMAL //The weight class the stack should have at amount > 2/3rds max_amount
 	var/novariants = TRUE //Determines whether the item should update it's sprites based on amount.
+	var/mats_per_stack = 0
+	///Datum material type that this stack is made of
+	var/material_type
 	//NOTE: When adding grind_results, the amounts should be for an INDIVIDUAL ITEM - these amounts will be multiplied by the stack size in on_grind()
 	var/obj/structure/table/tableVariant // we tables now (stores table variant to be built from this stack)
 
@@ -35,7 +39,6 @@
 	return TRUE
 
 /obj/item/stack/Initialize(mapload, new_amount, merge = TRUE)
-	. = ..()
 	if(new_amount != null)
 		amount = new_amount
 	while(amount > max_amount)
@@ -43,13 +46,29 @@
 		new type(loc, max_amount, FALSE)
 	if(!merge_type)
 		merge_type = type
+	if(custom_materials && custom_materials.len)
+		for(var/i in custom_materials)
+			custom_materials[getmaterialref(i)] = mats_per_stack * amount
+	. = ..()
 	if(merge)
 		for(var/obj/item/stack/S in loc)
 			if(S.merge_type == merge_type)
 				merge(S)
+	var/list/temp_recipes = get_main_recipes()
+	recipes = temp_recipes.Copy()
+	if(material_type)
+		var/datum/material/M = getmaterialref(material_type) //First/main material
+		for(var/i in M.categories)
+			switch(i)
+				if(MAT_CATEGORY_RIGID)
+					var/list/temp = SSmaterials.rigid_stack_recipes.Copy()
+					recipes += temp
 	update_weight()
 	update_icon()
 
+/obj/item/stack/proc/get_main_recipes()
+	return list()//empty list
+
 /obj/item/stack/proc/update_weight()
 	if(amount <= (max_amount * (1/3)))
 		w_class = CLAMP(full_w_class-2, WEIGHT_CLASS_TINY, full_w_class)
@@ -204,6 +223,12 @@
 		use(R.req_amount * multiplier)
 		log_craft("[O] crafted by [usr] at [loc_name(O.loc)]")
 
+		if(R.applies_mats && custom_materials && custom_materials.len)
+			var/list/used_materials = list()
+			for(var/i in custom_materials)
+				used_materials[getmaterialref(i)] = R.req_amount / R.res_amount * (MINERAL_MATERIAL_AMOUNT / custom_materials.len)
+			O.set_custom_materials(used_materials)
+
 		//START: oh fuck i'm so sorry
 		if(istype(O, /obj/structure/windoor_assembly))
 			var/obj/structure/windoor_assembly/W = O
@@ -288,6 +313,8 @@
 	amount -= used
 	if(check)
 		zero_amount()
+	for(var/i in custom_materials)
+		custom_materials[i] = amount * mats_per_stack
 	update_icon()
 	update_weight()
 	return TRUE
@@ -319,6 +346,10 @@
 		source.add_charge(amount * cost)
 	else
 		src.amount += amount
+	if(custom_materials && custom_materials.len)
+		for(var/i in custom_materials)
+			custom_materials[getmaterialref(i)] = MINERAL_MATERIAL_AMOUNT * src.amount
+		set_custom_materials() //Refresh
 	update_icon()
 	update_weight()
 
@@ -423,8 +454,9 @@
 	var/on_floor = FALSE
 	var/window_checks = FALSE
 	var/placement_checks = FALSE
+	var/applies_mats = FALSE
 
-/datum/stack_recipe/New(title, result_type, req_amount = 1, res_amount = 1, max_res_amount = 1,time = 0, one_per_turf = FALSE, on_floor = FALSE, window_checks = FALSE, placement_checks = FALSE )
+/datum/stack_recipe/New(title, result_type, req_amount = 1, res_amount = 1, max_res_amount = 1,time = 0, one_per_turf = FALSE, on_floor = FALSE, window_checks = FALSE, placement_checks = FALSE, applies_mats = FALSE)
 
 
 	src.title = title
@@ -437,6 +469,7 @@
 	src.on_floor = on_floor
 	src.window_checks = window_checks
 	src.placement_checks = placement_checks
+	src.applies_mats = applies_mats
 /*
  * Recipe list datum
  */

code/game/objects/items/stacks/tiles/tile_mineral.dm

@@ -5,7 +5,7 @@
 	icon_state = "tile_plasma"
 	turf_type = /turf/open/floor/mineral/plasma
 	mineralType = "plasma"
-	materials = list(MAT_PLASMA=500)
+	custom_materials = list(/datum/material/plasma=500)
 
 /obj/item/stack/tile/mineral/uranium
 	name = "uranium tile"
@@ -14,7 +14,7 @@
 	icon_state = "tile_uranium"
 	turf_type = /turf/open/floor/mineral/uranium
 	mineralType = "uranium"
-	materials = list(MAT_URANIUM=500)
+	custom_materials = list(/datum/material/uranium=500)
 
 /obj/item/stack/tile/mineral/gold
 	name = "gold tile"
@@ -23,7 +23,7 @@
 	icon_state = "tile_gold"
 	turf_type = /turf/open/floor/mineral/gold
 	mineralType = "gold"
-	materials = list(MAT_GOLD=500)
+	custom_materials = list(/datum/material/gold=500)
 
 /obj/item/stack/tile/mineral/silver
 	name = "silver tile"
@@ -32,7 +32,7 @@
 	icon_state = "tile_silver"
 	turf_type = /turf/open/floor/mineral/silver
 	mineralType = "silver"
-	materials = list(MAT_SILVER=500)
+	custom_materials = list(/datum/material/silver=500)
 
 /obj/item/stack/tile/mineral/diamond
 	name = "diamond tile"
@@ -41,7 +41,7 @@
 	icon_state = "tile_diamond"
 	turf_type = /turf/open/floor/mineral/diamond
 	mineralType = "diamond"
-	materials = list(MAT_DIAMOND=500)
+	custom_materials = list(/datum/material/diamond=500)
 
 /obj/item/stack/tile/mineral/bananium
 	name = "bananium tile"
@@ -50,7 +50,7 @@
 	icon_state = "tile_bananium"
 	turf_type = /turf/open/floor/mineral/bananium
 	mineralType = "bananium"
-	materials = list(MAT_BANANIUM=500)
+	custom_materials = list(/datum/material/bananium=500)
 
 /obj/item/stack/tile/mineral/abductor
 	name = "alien floor tile"
@@ -68,7 +68,7 @@
 	icon_state = "tile_shuttle"
 	turf_type = /turf/open/floor/mineral/titanium
 	mineralType = "titanium"
-	materials = list(MAT_TITANIUM=500)
+	custom_materials = list(/datum/material/titanium=500)
 
 /obj/item/stack/tile/mineral/plastitanium
 	name = "plastitanium tile"
@@ -77,4 +77,5 @@
 	icon_state = "tile_darkshuttle"
 	turf_type = /turf/open/floor/mineral/plastitanium
 	mineralType = "plastitanium"
-	materials = list(MAT_TITANIUM=250, MAT_PLASMA=250)
+	custom_materials = list(/datum/material/titanium=250, /datum/material/plasma=250)
+	material_flags = MATERIAL_NO_EFFECTS

code/game/objects/items/stacks/tiles/tile_types.dm

@@ -9,6 +9,7 @@
 	throw_speed = 3
 	throw_range = 7
 	max_amount = 60
+	mats_per_stack = 500
 	var/turf_type = null
 	var/mineralType = null
 	novariants = TRUE
@@ -434,7 +435,7 @@
 	desc = "Those could work as a pretty decent throwing weapon."
 	icon_state = "tile"
 	force = 6
-	materials = list(MAT_METAL=500)
+	custom_materials = list(/datum/material/iron=500)
 	throwforce = 10
 	flags_1 = CONDUCT_1
 	turf_type = /turf/open/floor/plasteel
@@ -444,6 +445,6 @@
 
 /obj/item/stack/tile/plasteel/cyborg
 	desc = "The ground you walk on." //Not the usual floor tile desc as that refers to throwing, Cyborgs can't do that - RR
-	materials = list() // All other Borg versions of items have no Metal or Glass - RR
+	custom_materials = null // All other Borg versions of items have no Metal or Glass - RR
 	is_cyborg = 1
 	cost = 125

code/game/objects/items/storage/bags.dm

@@ -114,6 +114,7 @@
 
 /obj/item/storage/bag/ore/ComponentInitialize()
 	. = ..()
+	AddComponent(/datum/component/rad_insulation, 0.01) //please datum mats no more cancer
 	var/datum/component/storage/concrete/stack/STR = GetComponent(/datum/component/storage/concrete/stack)
 	STR.allow_quick_empty = TRUE
 	STR.can_hold = typecacheof(list(/obj/item/stack/ore))
@@ -321,7 +322,7 @@
 	throw_range = 5
 	w_class = WEIGHT_CLASS_BULKY
 	flags_1 = CONDUCT_1
-	materials = list(MAT_METAL=3000)
+	custom_materials = list(/datum/material/iron=3000)
 
 /obj/item/storage/bag/tray/ComponentInitialize()
 	. = ..()

code/game/objects/items/storage/belt.dm

@@ -328,7 +328,7 @@
 	desc = "Proves to the world that you are the strongest!"
 	icon_state = "championbelt"
 	item_state = "champion"
-	materials = list(MAT_GOLD=400)
+	custom_materials = list(/datum/material/gold=400)
 
 /obj/item/storage/belt/champion/ComponentInitialize()
 	. = ..()

code/game/objects/items/storage/toolbox.dm

@@ -3,8 +3,8 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 /obj/item/storage/toolbox
 	name = "toolbox"
 	desc = "Danger. Very robust."
-	icon_state = "red"
-	item_state = "toolbox_red"
+	icon_state = "toolbox_default"
+	item_state = "toolbox_default"
 	lefthand_file = 'icons/mob/inhands/equipment/toolbox_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/toolbox_righthand.dmi'
 	flags_1 = CONDUCT_1
@@ -13,16 +13,16 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	throw_speed = 2
 	throw_range = 7
 	w_class = WEIGHT_CLASS_BULKY
-	materials = list(MAT_METAL = 500)
 	attack_verb = list("robusted")
 	hitsound = 'sound/weapons/smash.ogg'
+	custom_materials = list(/datum/material/iron = 500)
+	material_flags = MATERIAL_COLOR
 	var/latches = "single_latch"
 	var/has_latches = TRUE
 	var/can_rubberify = TRUE
 	rad_flags = RAD_PROTECT_CONTENTS | RAD_NO_CONTAMINATE //very protecc too
 
 /obj/item/storage/toolbox/Initialize(mapload)
-	. = ..()
 	if(has_latches)
 		if(prob(10))
 			latches = "double_latch"
@@ -30,6 +30,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 				latches = "triple_latch"
 	if(mapload && can_rubberify && prob(5))
 		rubberify()
+	. = ..()
 	update_icon()
 
 /obj/item/storage/toolbox/update_icon()
@@ -48,6 +49,9 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 
 /obj/item/storage/toolbox/emergency
 	name = "emergency toolbox"
+	icon_state = "red"
+	item_state = "toolbox_red"
+	material_flags = NONE
 
 /obj/item/storage/toolbox/emergency/PopulateContents()
 	new /obj/item/crowbar/red(src)
@@ -72,6 +76,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	name = "mechanical toolbox"
 	icon_state = "blue"
 	item_state = "toolbox_blue"
+	material_flags = NONE
 
 /obj/item/storage/toolbox/mechanical/PopulateContents()
 	new /obj/item/screwdriver(src)
@@ -100,6 +105,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	name = "electrical toolbox"
 	icon_state = "yellow"
 	item_state = "toolbox_yellow"
+	material_flags = NONE
 
 /obj/item/storage/toolbox/electrical/PopulateContents()
 	var/pickedcolor = pick("red","yellow","green","blue","pink","orange","cyan","white")
@@ -121,6 +127,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	desc = "A toolbox painted black with a red stripe. It looks more heavier than normal toolboxes."
 	force = 15
 	throwforce = 18
+	material_flags = NONE
 
 /obj/item/storage/toolbox/syndicate/ComponentInitialize()
 	. = ..()
@@ -140,6 +147,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	name = "mechanical toolbox"
 	icon_state = "blue"
 	item_state = "toolbox_blue"
+	material_flags = NONE
 
 /obj/item/storage/toolbox/drone/PopulateContents()
 	var/pickedcolor = pick("red","yellow","green","blue","pink","orange","cyan","white")
@@ -161,6 +169,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	w_class = WEIGHT_CLASS_HUGE
 	attack_verb = list("robusted", "crushed", "smashed")
 	can_rubberify = FALSE
+	material_flags = NONE
 	var/fabricator_type = /obj/item/clockwork/replica_fabricator/scarab
 
 /obj/item/storage/toolbox/brass/ComponentInitialize()
@@ -202,6 +211,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	w_class = WEIGHT_CLASS_HUGE		//heyo no bohing this!
 	force = 18		//spear damage
 	can_rubberify = FALSE
+	material_flags = NONE
 
 /obj/item/storage/toolbox/plastitanium/afterattack(atom/A, mob/user, proximity)
 	. = ..()
@@ -217,6 +227,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	icon_state = "green"
 	item_state = "toolbox_green"
 	w_class = WEIGHT_CLASS_GIGANTIC //Holds more than a regular toolbox!
+	material_flags = NONE
 
 /obj/item/storage/toolbox/artistic/ComponentInitialize()
 	. = ..()
@@ -261,6 +272,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	throwforce = 14
 	throw_speed = 5
 	throw_range = 10
+	material_flags = NONE
 
 /obj/item/storage/toolbox/gold_real/PopulateContents()
 	new /obj/item/screwdriver/nuke(src)
@@ -286,6 +298,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	force = 0
 	throwforce = 0
 	can_rubberify = FALSE
+	material_flags = NONE
 
 /obj/item/storage/toolbox/proc/rubberify()
 	name = "rubber [name]"
@@ -293,7 +306,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	desc = replacetext(desc, "robust", "safe")
 	desc = replacetext(desc, "heavier", "bouncier")
 	DISABLE_BITFIELD(flags_1, CONDUCT_1)
-	materials = typelist("materials", null)
+	custom_materials = null
 	damtype = STAMINA
 	force += 3 //to compensate the higher stamina K.O. threshold compared to actual health.
 	throwforce += 3
@@ -315,12 +328,13 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 	name = "rubber toolbox"
 	desc = "Bouncy. Very safe."
 	flags_1 = null
-	materials = null
+	custom_materials = null
 	damtype = STAMINA
 	force = 15
 	throwforce = 15
 	attack_verb = list("robusted", "bounced")
 	can_rubberify = FALSE //we are already the future.
+	material_flags = NONE
 
 /obj/item/storage/toolbox/rubber/Initialize()
 	icon_state = pick("blue", "red", "yellow", "green")

code/game/objects/items/tanks/tanks.dm

@@ -11,7 +11,7 @@
 	throwforce = 10
 	throw_speed = 1
 	throw_range = 4
-	materials = list(MAT_METAL = 500)
+	custom_materials = list(/datum/material/iron = 500)
 	actions_types = list(/datum/action/item_action/set_internals)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 10, "bio" = 0, "rad" = 0, "fire" = 80, "acid" = 30)
 	var/datum/gas_mixture/air_contents = null

code/game/objects/items/teleportation.dm

@@ -24,7 +24,7 @@
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
 	throw_speed = 3
 	throw_range = 7
-	materials = list(MAT_METAL=400)
+	custom_materials = list(/datum/material/iron=400)
 
 /obj/item/locator/attack_self(mob/user)
 	user.set_machine(src)
@@ -125,7 +125,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	throw_speed = 3
 	throw_range = 5
-	materials = list(MAT_METAL=10000)
+	custom_materials = list(/datum/material/iron=10000)
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 30, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 100)
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | ACID_PROOF
 	var/list/active_portal_pairs

code/game/objects/items/tools/crowbar.dm

@@ -11,7 +11,7 @@
 	force = 5
 	throwforce = 7
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=50)
+	custom_materials = list(/datum/material/iron=50)
 
 	attack_verb = list("attacked", "bashed", "battered", "bludgeoned", "whacked")
 	tool_behaviour = TOOL_CROWBAR
@@ -55,7 +55,7 @@
 	w_class = WEIGHT_CLASS_NORMAL
 	throw_speed = 3
 	throw_range = 3
-	materials = list(MAT_METAL=70)
+	custom_materials = list(/datum/material/iron=70)
 	icon_state = "crowbar_large"
 	item_state = "crowbar"
 	toolspeed = 0.5
@@ -76,7 +76,7 @@
 	item_state = "jawsoflife"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
-	materials = list(MAT_METAL=150,MAT_SILVER=50,MAT_TITANIUM=25)
+	custom_materials = list(/datum/material/iron=150,/datum/material/silver=50,/datum/material/titanium=25)
 
 	usesound = 'sound/items/jaws_pry.ogg'
 	force = 15

code/game/objects/items/tools/screwdriver.dm

@@ -13,7 +13,7 @@
 	throwforce = 5
 	throw_speed = 3
 	throw_range = 5
-	materials = list(MAT_METAL=75)
+	custom_materials = list(/datum/material/iron=75)
 	attack_verb = list("stabbed")
 	hitsound = 'sound/weapons/bladeslice.ogg'
 	usesound = list('sound/items/screwdriver.ogg', 'sound/items/screwdriver2.ogg')
@@ -114,7 +114,7 @@
 	item_state = "drill"
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
-	materials = list(MAT_METAL=150,MAT_SILVER=50,MAT_TITANIUM=25) //done for balance reasons, making them high value for research, but harder to get
+	custom_materials = list(/datum/material/iron=150,/datum/material/silver=50,/datum/material/titanium=25) //done for balance reasons, making them high value for research, but harder to get
 	force = 8 //might or might not be too high, subject to change
 	w_class = WEIGHT_CLASS_SMALL
 	throwforce = 8

code/game/objects/items/tools/weldingtool.dm

@@ -21,7 +21,7 @@
 	armor = list("melee" = 0, "bullet" = 0, "laser" = 0, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 100, "acid" = 30)
 	resistance_flags = FIRE_PROOF
 
-	materials = list(MAT_METAL=70, MAT_GLASS=30)
+	custom_materials = list(/datum/material/iron=70, /datum/material/glass=30)
 	var/welding = 0 	//Whether or not the welding tool is off(0), on(1) or currently welding(2)
 	var/status = TRUE 		//Whether the welder is secured or unsecured (able to attach rods to it to make a flamethrower)
 	var/max_fuel = 20 	//The max amount of fuel the welder can hold
@@ -297,7 +297,7 @@
 	desc = "A slightly larger welder with a larger tank."
 	icon_state = "indwelder"
 	max_fuel = 40
-	materials = list(MAT_GLASS=60)
+	custom_materials = list(/datum/material/glass=60)
 
 /obj/item/weldingtool/largetank/cyborg
 	name = "integrated welding tool"
@@ -316,7 +316,7 @@
 	icon_state = "miniwelder"
 	max_fuel = 10
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_METAL=30, MAT_GLASS=10)
+	custom_materials = list(/datum/material/iron=30, /datum/material/glass=10)
 	change_icons = 0
 
 /obj/item/weldingtool/mini/flamethrower_screwdriver()
@@ -342,7 +342,7 @@
 	icon_state = "upindwelder"
 	item_state = "upindwelder"
 	max_fuel = 80
-	materials = list(MAT_METAL=70, MAT_GLASS=120)
+	custom_materials = list(/datum/material/iron=70, /datum/material/glass=120)
 
 /obj/item/weldingtool/experimental
 	name = "experimental welding tool"
@@ -350,7 +350,7 @@
 	icon_state = "exwelder"
 	item_state = "exwelder"
 	max_fuel = 40
-	materials = list(MAT_METAL=70, MAT_GLASS=120)
+	custom_materials = list(/datum/material/iron=70, /datum/material/glass=120)
 	var/last_gen = 0
 	change_icons = 0
 	can_off_process = 1

code/game/objects/items/tools/wirecutters.dm

@@ -12,7 +12,7 @@
 	throw_speed = 3
 	throw_range = 7
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=80)
+	custom_materials = list(/datum/material/iron=80)
 	attack_verb = list("pinched", "nipped")
 	hitsound = 'sound/items/wirecutter.ogg'
 	usesound = 'sound/items/wirecutter.ogg'
@@ -98,7 +98,7 @@
 	icon_state = "jaws_cutter"
 	item_state = "jawsoflife"
 
-	materials = list(MAT_METAL=150,MAT_SILVER=50,MAT_TITANIUM=25)
+	custom_materials = list(/datum/material/iron=150,/datum/material/silver=50,/datum/material/titanium=25)
 	usesound = 'sound/items/jaws_cut.ogg'
 	toolspeed = 0.25
 	random_color = FALSE

code/game/objects/items/tools/wrench.dm

@@ -11,7 +11,7 @@
 	throwforce = 7
 	w_class = WEIGHT_CLASS_SMALL
 	usesound = 'sound/items/ratchet.ogg'
-	materials = list(MAT_METAL=150)
+	custom_materials = list(/datum/material/iron=150)
 
 	attack_verb = list("bashed", "battered", "bludgeoned", "whacked")
 	tool_behaviour = TOOL_WRENCH
@@ -59,7 +59,7 @@
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
 	usesound = 'sound/items/drill_use.ogg'
-	materials = list(MAT_METAL=150,MAT_SILVER=50,MAT_TITANIUM=25)
+	custom_materials = list(/datum/material/iron=150,/datum/material/silver=50,/datum/material/titanium=25)
  //done for balance reasons, making them high value for research, but harder to get
 	force = 8 //might or might not be too high, subject to change
 	w_class = WEIGHT_CLASS_SMALL

code/game/objects/items/toys.dm

@@ -143,7 +143,7 @@
 	flags_1 =  CONDUCT_1
 	slot_flags = ITEM_SLOT_BELT
 	w_class = WEIGHT_CLASS_NORMAL
-	materials = list(MAT_METAL=10, MAT_GLASS=10)
+	custom_materials = list(/datum/material/iron=10, /datum/material/glass=10)
 	attack_verb = list("struck", "pistol whipped", "hit", "bashed")
 	var/bullets = 7
 
@@ -197,7 +197,7 @@
 	icon = 'icons/obj/ammo.dmi'
 	icon_state = "357OLD-7"
 	w_class = WEIGHT_CLASS_TINY
-	materials = list(MAT_METAL=10, MAT_GLASS=10)
+	custom_materials = list(/datum/material/iron=10, /datum/material/glass=10)
 	var/amount_left = 7
 
 /obj/item/toy/ammo/gun/update_icon()

code/game/objects/items/twohanded.dm

@@ -593,7 +593,7 @@
 	throw_speed = 4
 	embedding = list("embedded_impact_pain_multiplier" = 3, "embed_chance" = 90)
 	armour_penetration = 10
-	materials = list(MAT_METAL=1150, MAT_GLASS=2075)
+	custom_materials = list(/datum/material/iron=1150, /datum/material/glass=2075)
 	hitsound = 'sound/weapons/bladeslice.ogg'
 	attack_verb = list("attacked", "poked", "jabbed", "torn", "gored")
 	sharpness = IS_SHARP
@@ -709,7 +709,7 @@
 	throwforce = 13
 	throw_speed = 2
 	throw_range = 4
-	materials = list(MAT_METAL=13000)
+	custom_materials = list(/datum/material/iron=13000)
 	attack_verb = list("sawed", "torn", "cut", "chopped", "diced")
 	hitsound = "swing_hit"
 	sharpness = IS_SHARP

code/game/objects/items/weaponry.dm

@@ -247,7 +247,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	force = 9
 	throwforce = 10
 	w_class = WEIGHT_CLASS_NORMAL
-	materials = list(MAT_METAL=1150, MAT_GLASS=75)
+	custom_materials = list(/datum/material/iron=1150, /datum/material/glass=75)
 	attack_verb = list("hit", "bludgeoned", "whacked", "bonked")
 
 /obj/item/wirerod/attackby(obj/item/I, mob/user, params)
@@ -291,7 +291,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	embedding = list("embedded_pain_multiplier" = 4, "embed_chance" = 100, "embedded_fall_chance" = 0)
 	w_class = WEIGHT_CLASS_SMALL
 	sharpness = IS_SHARP
-	materials = list(MAT_METAL=500, MAT_GLASS=500)
+	custom_materials = list(/datum/material/iron=500, /datum/material/glass=500)
 	resistance_flags = FIRE_PROOF
 
 
@@ -307,7 +307,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	throwforce = 5
 	throw_speed = 3
 	throw_range = 6
-	materials = list(MAT_METAL=12000)
+	custom_materials = list(/datum/material/iron=12000)
 	hitsound = 'sound/weapons/genhit.ogg'
 	attack_verb = list("stubbed", "poked")
 	resistance_flags = FIRE_PROOF
@@ -391,7 +391,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	force = 5
 	throwforce = 5
 	w_class = WEIGHT_CLASS_SMALL
-	materials = list(MAT_METAL=50)
+	custom_materials = list(/datum/material/iron=50)
 	attack_verb = list("bludgeoned", "whacked", "disciplined", "thrashed")
 
 /obj/item/staff

code/game/objects/obj_defense.dm

@@ -6,20 +6,19 @@
 		return
 	if(sound_effect)
 		play_attack_sound(damage_amount, damage_type, damage_flag)
-	if(!(resistance_flags & INDESTRUCTIBLE) && obj_integrity > 0)
-		damage_amount = run_obj_armor(damage_amount, damage_type, damage_flag, attack_dir, armour_penetration)
-		if(damage_amount >= DAMAGE_PRECISION)
-			. = damage_amount
-			var/old_integ = obj_integrity
-			obj_integrity = max(old_integ - damage_amount, 0)
-			if(obj_integrity <= 0)
-				var/int_fail = integrity_failure
-				if(int_fail && old_integ > int_fail)
-					obj_break(damage_flag)
-				obj_destruction(damage_flag)
-			else if(integrity_failure)
-				if(obj_integrity <= integrity_failure)
-					obj_break(damage_flag)
+	if((resistance_flags & INDESTRUCTIBLE) || obj_integrity <= 0)
+		return
+	damage_amount = run_obj_armor(damage_amount, damage_type, damage_flag, attack_dir, armour_penetration)
+	if(damage_amount < DAMAGE_PRECISION)
+		return
+	. = damage_amount
+	obj_integrity = max(obj_integrity - damage_amount, 0)
+	//BREAKING FIRST
+	if(integrity_failure && obj_integrity <= integrity_failure * max_integrity)
+		obj_break(damage_flag)
+	//DESTROYING SECOND
+	if(obj_integrity <= 0)
+		obj_destruction(damage_flag)
 
 //returns the damage value of the attack after processing the obj's various armor protections
 /obj/proc/run_obj_armor(damage_amount, damage_type, damage_flag = 0, attack_dir, armour_penetration = 0)
@@ -271,7 +270,7 @@ GLOBAL_DATUM_INIT(acid_overlay, /mutable_appearance, mutable_appearance('icons/e
 
 //changes max_integrity while retaining current health percentage
 //returns TRUE if the obj broke, FALSE otherwise
-/obj/proc/modify_max_integrity(new_max, can_break = TRUE, damage_type = BRUTE, new_failure_integrity = null)
+/obj/proc/modify_max_integrity(new_max, can_break = TRUE, damage_type = BRUTE)
 	var/current_integrity = obj_integrity
 	var/current_max = max_integrity
 
@@ -282,10 +281,7 @@ GLOBAL_DATUM_INIT(acid_overlay, /mutable_appearance, mutable_appearance('icons/e
 
 	max_integrity = new_max
 
-	if(new_failure_integrity != null)
-		integrity_failure = new_failure_integrity
-
-	if(can_break && integrity_failure && current_integrity <= integrity_failure)
+	if(can_break && integrity_failure && current_integrity <= integrity_failure * max_integrity)
 		obj_break(damage_type)
 		return TRUE
 	return FALSE

code/game/objects/objs.dm

@@ -12,7 +12,7 @@
 	var/datum/armor/armor
 	var/obj_integrity	//defaults to max_integrity
 	var/max_integrity = 500
-	var/integrity_failure = 0 //0 if we have no special broken behavior
+	var/integrity_failure = 0 //0 if we have no special broken behavior, otherwise is a percentage of at what point the obj breaks. 0.5 being 50%
 
 	var/resistance_flags = NONE // INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | ON_FIRE | UNACIDABLE | ACID_PROOF
 
@@ -46,7 +46,6 @@
 	return ..()
 
 /obj/Initialize()
-	. = ..()
 	if (islist(armor))
 		armor = getArmor(arglist(armor))
 	else if (!armor)
@@ -56,6 +55,9 @@
 
 	if(obj_integrity == null)
 		obj_integrity = max_integrity
+
+	. = ..() //Do this after, else mat datums is mad.
+
 	if (set_obj_flags)
 		var/flagslist = splittext(set_obj_flags,";")
 		var/list/string_to_objflag = GLOB.bitfields["obj_flags"]

code/game/objects/structures/aliens.dm

@@ -218,7 +218,7 @@
 	density = FALSE
 	anchored = TRUE
 	max_integrity = 100
-	integrity_failure = 5
+	integrity_failure = 0.05
 	var/status = GROWING	//can be GROWING, GROWN or BURST; all mutually exclusive
 	layer = MOB_LAYER
 	var/obj/item/clothing/mask/facehugger/child
@@ -232,7 +232,7 @@
 		addtimer(CALLBACK(src, .proc/Grow), rand(MIN_GROWTH_TIME, MAX_GROWTH_TIME))
 	proximity_monitor = new(src, status == GROWN ? 1 : 0)
 	if(status == BURST)
-		obj_integrity = integrity_failure
+		obj_integrity = integrity_failure * max_integrity
 
 /obj/structure/alien/egg/update_icon()
 	..()

code/game/objects/structures/barsigns.dm

@@ -5,7 +5,7 @@
 	icon_state = "empty"
 	req_access = list(ACCESS_BAR)
 	max_integrity = 500
-	integrity_failure = 250
+	integrity_failure = 0.5
 	armor = list("melee" = 20, "bullet" = 20, "laser" = 20, "energy" = 100, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 50)
 	buildable_sign = 0
 	var/list/barsigns=list()

code/game/objects/structures/beds_chairs/bed.dm

@@ -17,7 +17,7 @@
 	buckle_lying = TRUE
 	resistance_flags = FLAMMABLE
 	max_integrity = 100
-	integrity_failure = 30
+	integrity_failure = 0.35
 	var/buildstacktype = /obj/item/stack/sheet/metal
 	var/buildstackamount = 2
 	var/bolts = TRUE