Unit test material checks are now performed on all crafting recipes by default. All stack recipes now transfer mats to the results (#92620)

## About The Pull Request Extends the part of the crafting unit test that ensures consistency between the total mats of the components of a recipe (or rather, the result of said recipe) and a generic instance of the same type as its result, previously only implemented on food recipes. ## Why It's Good For The Game This ensures a degree of consistency with the material composition of various objects in the game. I couldn't do it in the original PR as that one was too big already and it took months to get it merged, and have the relative bugs fixed. Currently a WIP as I slowly deal with the unit test reports. ## Changelog 🆑 refactor: Follow-up to the crafting/material refactor from months ago. All objects crafted with stacks now inherit their mat composition (not necessarily the effects and color) by default, while previously only a few things like chair, sinks and toilets did. Report any object looking or behaving weirdly as a result. fix: The material composition of ammo boxes is no longer a 1/10 of what it's supposed to be. It was a shitty hack to make it harder to recycle empty ammo boxes. Instead, they lose materials as they're emptied now. /🆑
2026-08-24 21:48:39 +01:00 · 2025-12-02 18:29:01 -05:00
parent 085007eae1
commit 0b0c5ea91e
272 changed files with 850 additions and 280 deletions
@@ -26,16 +26,16 @@
 #define CRAFT_ON_SOLID_GROUND (1<<4)
 /// If the craft checks that there are objects with density in the same turf when being built
 #define CRAFT_CHECK_DENSITY (1<<5)
-/// If the created atom will gain custom mat datums
-#define CRAFT_APPLIES_MATS (1<<6)
 /// Crafting passes reagents of components to the finished product
-#define CRAFT_TRANSFERS_REAGENTS (1<<7)
+#define CRAFT_TRANSFERS_REAGENTS (1<<6)
 /// Crafting clears all reagents present in the finished product
-#define CRAFT_CLEARS_REAGENTS (1<<8)
-/// For the crafting unit test, ensures that the custom materials of an item are the same when crafted and spawned.
-#define CRAFT_ENFORCE_MATERIALS_PARITY (1<<9)
+#define CRAFT_CLEARS_REAGENTS (1<<7)
+/// For the crafting unit test, we don't check if the custom materials of an item are the same when crafted and spawned should its recipe have this flag.
+#define CRAFT_SKIP_MATERIALS_PARITY (1<<8)
 /// Exclusive to the personal_crafting component, skips the time spent crafting the recipe.
-#define CRAFT_IGNORE_DO_AFTER (1<<10)
+#define CRAFT_IGNORE_DO_AFTER (1<<9)
+/// This craft won't change the materials of the resulting item to match that of the combined components
+#define CRAFT_NO_MATERIALS (1<<10)

 //food/drink crafting defines
 //When adding new defines, please make sure to also add them to the encompassing list
@@ -21,16 +21,16 @@ SUBSYSTEM_DEF(materials)
 	var/list/list/material_combos
 	///List of stackcrafting recipes for materials using base recipes
 	var/list/base_stack_recipes = list(
-		new /datum/stack_recipe("Chair", /obj/structure/chair/greyscale, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_FURNITURE),
-		new /datum/stack_recipe("Toilet", /obj/structure/toilet/greyscale, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_FURNITURE),
-		new /datum/stack_recipe("Sink Frame", /obj/structure/sinkframe, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_FURNITURE),
-		new /datum/stack_recipe("Material floor tile", /obj/item/stack/tile/material, 1, 4, 20, crafting_flags = CRAFT_APPLIES_MATS, category = CAT_TILES),
-		new /datum/stack_recipe("Material airlock assembly", /obj/structure/door_assembly/door_assembly_material, 4, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS),
-		new /datum/stack_recipe("Material platform", /obj/structure/platform/material, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
+		new /datum/stack_recipe("Chair", /obj/structure/chair/greyscale, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_FURNITURE),
+		new /datum/stack_recipe("Toilet", /obj/structure/toilet/greyscale, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_FURNITURE),
+		new /datum/stack_recipe("Sink Frame", /obj/structure/sinkframe, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_FURNITURE),
+		new /datum/stack_recipe("Material floor tile", /obj/item/stack/tile/material, 1, 4, 20, crafting_flags = CRAFT_SKIP_MATERIALS_PARITY, category = CAT_TILES),
+		new /datum/stack_recipe("Material airlock assembly", /obj/structure/door_assembly/door_assembly_material, 4, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_DOORS),
+		new /datum/stack_recipe("Material platform", /obj/structure/platform/material, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
 	)
 	///List of stackcrafting recipes for materials using rigid recipes
 	var/list/rigid_stack_recipes = list(
-		new /datum/stack_recipe("Carving block", /obj/structure/carving_block, 5, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_STRUCTURE),
+		new /datum/stack_recipe("Carving block", /obj/structure/carving_block, 5, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_STRUCTURE),
 	)

 	///A list of dimensional themes used by the dimensional anomaly and other things, most of which require materials to function.
@@ -157,8 +157,7 @@ SUBSYSTEM_DEF(materials)
 	if(!material_combos)
 		InitializeMaterials()
 	var/list/combo_params = list()
-	for(var/x in materials_declaration)
-		var/datum/material/mat = x
+	for(var/datum/material/mat as anything in materials_declaration)
 		combo_params += "[istype(mat) ? mat.id : mat]=[OPTIMAL_COST(materials_declaration[mat] * multiplier)]"
 	sortTim(combo_params, GLOBAL_PROC_REF(cmp_text_asc)) // We have to sort now in case the declaration was not in order
 	var/combo_index = combo_params.Join("-")
@@ -37,7 +37,7 @@
 	var/atom/result = new bake_result
 	if(!item_target.compare_materials(result))
 		var/warning = "custom_materials of [result.type] when baked compared to just spawned don't match"
-		var/what_it_should_be = item_target.get_materials_english_list()
+		var/what_it_should_be = item_target.transcribe_materials_list()
 		stack_trace("[warning]. custom_materials should be [what_it_should_be].")
 	qdel(result)

@@ -26,6 +26,8 @@
 	var/list/parts = list()
 	///items, structures and machineries of types that are in this list won't transfer their materials to the result
 	var/list/requirements_mats_blacklist
+	///if set, the materials in this list and their values will be subtracted from the result.
+	var/list/removed_mats
 	///like tool_behaviors but for reagents
 	var/list/chem_catalysts = list()
 	///where it shows up in the crafting UI
@@ -102,9 +104,9 @@
 	src.reqs[material] = stack_recipe.req_amount
 	src.category = stack_recipe.category || CAT_MISC
 	src.placement_checks = stack_recipe.placement_checks
+	src.crafting_flags = stack_recipe.crafting_flags

-	if(!(stack_recipe.crafting_flags & CRAFT_APPLIES_MATS))
-		requirements_mats_blacklist = list(material) //the item is not intended to have mats :shrug:
+	src.removed_mats = stack_recipe.removed_mats

 /**
 * Run custom pre-craft checks for this recipe, don't add feedback messages in this because it will spam the client
@@ -42,6 +42,7 @@
 	)
 	time = 5 SECONDS
 	category = CAT_CHEMISTRY
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY //there are two ways to make a chem bombcore. We go with the first one for mats check

 /datum/crafting_recipe/alcohol_burner
 	name = "Burner (Ethanol)"
@@ -27,8 +27,9 @@
 		/obj/item/stack/sheet/mineral/bamboo = 20
 	)
 	result = /obj/item/storage/basket
+	crafting_flags = CRAFT_SKIP_MATERIALS_PARITY
 	category = CAT_CONTAINERS
-	crafting_flags = parent_type::crafting_flags | CRAFT_MUST_BE_LEARNED
+	crafting_flags = parent_type::crafting_flags | CRAFT_MUST_BE_LEARNED | CRAFT_SKIP_MATERIALS_PARITY
 	steps = list(
 		"master the art of underwater basketweaving",
 		"be underwater"
@@ -244,15 +244,30 @@
 	//used to gather the material composition of the utilized requirements to transfer to the result
 	var/list/total_materials = list()
 	var/list/stuff_to_use = get_used_reqs(recipe, crafter, total_materials)
+
+	for(var/mat in recipe.removed_mats)
+		var/to_remove = recipe.removed_mats[mat]
+		var/datum/material/ref_mat = locate(mat) in total_materials
+		if(!ref_mat)
+			continue
+		if(total_materials[ref_mat] < to_remove)
+			total_materials -= ref_mat
+		else
+			total_materials[ref_mat] -= to_remove
+
 	var/atom/result
 	var/turf/craft_turf = get_turf(crafter.loc)
-	var/set_materials = TRUE
+	var/set_materials = !(recipe.crafting_flags & CRAFT_NO_MATERIALS)
 	if(ispath(recipe.result, /turf))
 		result = craft_turf.place_on_top(recipe.result)
 	else if(ispath(recipe.result, /obj/item/stack))
+		var/res_amount = recipe.result_amount || 1
 		//we don't merge the stack right away but try to put it in the hand of the crafter
-		result = new recipe.result(craft_turf, recipe.result_amount || 1, /*merge =*/FALSE)
-		set_materials = FALSE //stacks are bit too complex for it for now, but you're free to change that.
+		if(set_materials)
+			result = new recipe.result(craft_turf, res_amount, /*merge =*/ FALSE, /*mat_override =*/ total_materials, /*mat_amt =*/ 1 / res_amount)
+			set_materials = FALSE //We've already set the materials on init. Don't do it again
+		else
+			result = new recipe.result(craft_turf, res_amount, FALSE)
 	else
 		result = new recipe.result(craft_turf)
 		if(result.atom_storage && recipe.delete_contents)
@@ -60,6 +60,7 @@
 	)
 	time = 10 SECONDS
 	category = CAT_EQUIPMENT
+	removed_mats = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)

 /datum/crafting_recipe/motorized_wheelchair
 	name = "Motorized Wheelchair"
@@ -16,6 +16,7 @@
 	desc = "A prototype modular receiver and trigger assembly for a firearm."
 	icon = 'icons/obj/weapons/improvised.dmi'
 	icon_state = "receiver"
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5.5, /datum/material/cardboard = SHEET_MATERIAL_AMOUNT)

 /obj/item/weaponcrafting/receiver/create_slapcraft_component()
 	var/static/list/slapcraft_recipe_list = list(/datum/crafting_recipe/pipegun)
@@ -28,7 +29,7 @@
 /obj/item/weaponcrafting/stock
 	name = "rifle stock"
 	desc = "A classic rifle stock that doubles as a grip, roughly carved out of wood."
-	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 6)
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 8)
 	resistance_flags = FLAMMABLE
 	icon = 'icons/obj/weapons/improvised.dmi'
 	icon_state = "riflestock"
@@ -68,31 +69,61 @@
 /obj/item/weaponcrafting/gunkit/nuclear
 	name = "advanced energy gun parts kit (lethal/nonlethal)"
 	desc = "A suitcase containing the necessary gun parts to transform a standard energy gun into an advanced energy gun."
+	custom_materials = list(
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5,
+		/datum/material/glass = SHEET_MATERIAL_AMOUNT,
+		/datum/material/uranium = SHEET_MATERIAL_AMOUNT * 1.5,
+		/datum/material/titanium = HALF_SHEET_MATERIAL_AMOUNT,
+	)

 /obj/item/weaponcrafting/gunkit/tesla
 	name = "tesla cannon parts kit (lethal)"
 	desc = "A suitcase containing the necessary gun parts to construct a tesla cannon around a stabilized flux anomaly. Handle with care."
 	icon_state = "weaponskit_tesla"
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5, /datum/material/glass = SHEET_MATERIAL_AMOUNT * 5, /datum/material/silver = SHEET_MATERIAL_AMOUNT * 5)

 /obj/item/weaponcrafting/gunkit/xray
 	name = "x-ray laser gun parts kit (lethal)"
 	desc = "A suitcase containing the necessary gun parts to turn a laser gun into a x-ray laser gun. Do not point most parts directly towards face."
+	custom_materials = list(
+		/datum/material/gold = SHEET_MATERIAL_AMOUNT * 2.5,
+		/datum/material/uranium = SHEET_MATERIAL_AMOUNT * 2,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2.5,
+		/datum/material/titanium = SHEET_MATERIAL_AMOUNT,
+		/datum/material/bluespace = SHEET_MATERIAL_AMOUNT,
+	)

 /obj/item/weaponcrafting/gunkit/ion
 	name = "ion carbine parts kit (nonlethal/highly destructive/very lethal (silicons))"
 	desc = "A suitcase containing the necessary gun parts to transform a standard laser gun into a ion carbine. Perfect against lockers you don't have access to."
+	custom_materials = list(/datum/material/silver = SHEET_MATERIAL_AMOUNT * 3, /datum/material/iron = SHEET_MATERIAL_AMOUNT * 4, /datum/material/uranium = SHEET_MATERIAL_AMOUNT)

 /obj/item/weaponcrafting/gunkit/temperature
 	name = "temperature gun parts kit (less lethal/very lethal (lizardpeople))"
 	desc = "A suitcase containing the necessary gun parts to transform a standard energy gun into a temperature gun. Fantastic at birthday parties and killing indigenous populations of lizardpeople."
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 5, /datum/material/silver = SHEET_MATERIAL_AMOUNT * 1.5)

 /obj/item/weaponcrafting/gunkit/beam_rifle
 	name = "\improper Event Horizon anti-existential beam rifle part kit (DOOMSDAY DEVICE, DO NOT CONSTRUCT)"
 	desc = "What fevered minds wrought this terrible construction kit? To create a frame to harness the strange energies that flow through the Spinward Sector towards such horrible acts of violence?"
+	custom_materials = list(
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5,
+		/datum/material/glass =SHEET_MATERIAL_AMOUNT * 2.5,
+		/datum/material/diamond = SHEET_MATERIAL_AMOUNT * 2.5,
+		/datum/material/uranium = SHEET_MATERIAL_AMOUNT * 4,
+		/datum/material/silver = SHEET_MATERIAL_AMOUNT * 2.25,
+		/datum/material/gold = SHEET_MATERIAL_AMOUNT * 2.5,
+	)

 /obj/item/weaponcrafting/gunkit/ebow
 	name = "energy crossbow part kit (less lethal)"
 	desc = "Highly illegal weapons refurbishment kit that allows you to turn the standard proto-kinetic accelerator into a near-duplicate energy crossbow. Almost like the real thing!"
+	custom_materials = list(
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2.5,
+		/datum/material/glass = HALF_SHEET_MATERIAL_AMOUNT * 1.5,
+		/datum/material/uranium = HALF_SHEET_MATERIAL_AMOUNT * 1.5,
+		/datum/material/silver = HALF_SHEET_MATERIAL_AMOUNT * 1.5,
+	)

 /obj/item/weaponcrafting/gunkit/hellgun
 	name = "hellfire laser gun degradation kit (warcrime lethal)"
@@ -101,6 +132,7 @@
 /obj/item/weaponcrafting/gunkit/photon
 	name = "photon cannon parts kit (nonlethal)"
 	desc = "A suitcase containing the necessary gun parts to construct a photon cannon around a stabilized flux anomaly. Harness the power of the sun, in the palms of your hands."
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 3, /datum/material/glass = SHEET_MATERIAL_AMOUNT * 7, /datum/material/gold = SHEET_MATERIAL_AMOUNT * 5)

 /obj/item/weaponcrafting/gunkit/sks
 	name = "\improper Sakhno SKS semi-automatic rifle parts kit (lethal)"
@@ -62,6 +62,7 @@
 		/obj/item/melee/baton/security = 1,
 	)
 	tool_behaviors = list(TOOL_WELDER)
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY
 	time = 10 SECONDS
 	category = CAT_WEAPON_MELEE

@@ -73,6 +74,7 @@
 		/obj/item/melee/baton/telescopic/contractor_baton = 1,
 	)
 	tool_behaviors = list(TOOL_WELDER)
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY
 	time = 10 SECONDS
 	category = CAT_WEAPON_MELEE

@@ -8,6 +8,7 @@
 	result = /obj/item/stack/sheet/paperframes
 	result_amount = 5
 	category = CAT_STRUCTURE
+	requirements_mats_blacklist = list(/obj/item/stack/sheet/mineral/wood)

 /datum/crafting_recipe/rib
 	name = "Colossal Rib"
@@ -118,6 +119,12 @@
 	)
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WELDER, TOOL_DRILL)
 	time = 30 SECONDS
+	removed_mats = list(
+		/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 2,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.55,
+		/datum/material/titanium = SHEET_MATERIAL_AMOUNT,
+		/datum/material/glass = SHEET_MATERIAL_AMOUNT,
+	)
 	category = CAT_STRUCTURE

 /datum/crafting_recipe/vault
@@ -132,6 +139,14 @@
 	)
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WELDER, TOOL_DRILL)
 	time = 90 SECONDS
+	removed_mats = list(
+		/datum/material/metalhydrogen = SHEET_MATERIAL_AMOUNT * 5,
+		/datum/material/alloy/plastitanium = SHEET_MATERIAL_AMOUNT * 2,
+		/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 2,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.5,
+		/datum/material/titanium = SHEET_MATERIAL_AMOUNT,
+		/datum/material/glass = SHEET_MATERIAL_AMOUNT,
+	)
 	category = CAT_STRUCTURE
 	crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND

@@ -147,4 +162,10 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WELDER, TOOL_DRILL)
 	time = 90 SECONDS
 	category = CAT_STRUCTURE
+	removed_mats = list(
+		/datum/material/metalhydrogen = SHEET_MATERIAL_AMOUNT * 5,
+		/datum/material/alloy/plastitanium = SHEET_MATERIAL_AMOUNT * 2,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT,
+		/datum/material/glass = SHEET_MATERIAL_AMOUNT,
+	)
 	crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND
@@ -150,6 +150,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WIRECUTTER)
 	reqs = list(/obj/item/clothing/glasses/hud/security/sunglasses = 1)
 	category = CAT_EQUIPMENT
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/hudsunmed
 	name = "Medical HUDsunglasses"
@@ -168,6 +169,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WIRECUTTER)
 	reqs = list(/obj/item/clothing/glasses/hud/health/sunglasses = 1)
 	category = CAT_EQUIPMENT
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/hudsundiag
 	name = "Diagnostic HUDsunglasses"
@@ -186,6 +188,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WIRECUTTER)
 	reqs = list(/obj/item/clothing/glasses/hud/diagnostic/sunglasses = 1)
 	category = CAT_EQUIPMENT
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/scienceglasses
 	name = "Science Glasses"
@@ -204,6 +207,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WIRECUTTER)
 	reqs = list(/obj/item/clothing/glasses/sunglasses/chemical = 1)
 	category = CAT_EQUIPMENT
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/ghostsheet
 	name = "Ghost Sheet"
@@ -539,6 +543,7 @@
 		/obj/item/stack/sheet/mineral/metal_hydrogen = 1,
 		/obj/item/stack/sheet/mineral/zaukerite = 1,
 	)
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY // stupid recipe, don't give every atmos gas mask these mats.

 	category = CAT_CLOTHING

@@ -16,6 +16,7 @@
 	blacklist = list(/obj/item/grown/log/steel)
 	result = /obj/structure/bonfire
 	category = CAT_TOOLS
+	crafting_flags = parent_type::crafting_flags | CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/boneshovel
 	name = "Serrated Bone Shovel"
@@ -101,6 +101,7 @@
 	tool_behaviors = list(TOOL_SCREWDRIVER)
 	time = 1.2 SECONDS
 	category = CAT_WEAPON_AMMO
+	crafting_flags = CRAFT_SKIP_MATERIALS_PARITY

 /datum/crafting_recipe/trashball
 	name = "Trashball"
@@ -41,7 +41,7 @@
 	var/atom/result = new cook_result
 	if(!item_parent.compare_materials(result))
 		var/warning = "custom_materials of [result.type] when grilled compared to just spawned don't match"
-		var/what_it_should_be = item_parent.get_materials_english_list()
+		var/what_it_should_be = item_parent.transcribe_materials_list()
 		stack_trace("[warning]. custom_materials should be [what_it_should_be].")
 	qdel(result)

@@ -377,6 +377,7 @@
 	icon = 'icons/obj/devices/remote.dmi'
 	icon_state = "trapdoor_remote"
 	COOLDOWN_DECLARE(trapdoor_cooldown)
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 1.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)
 	var/trapdoor_cooldown_time = 2 SECONDS
 	var/obj/item/assembly/trapdoor/internals

@@ -474,6 +475,7 @@
 	desc = "A kit containing all the parts needed to build a trapdoor. Can only be used on open space."
 	icon = 'icons/obj/weapons/improvised.dmi'
 	icon_state = "kitsuitcase"
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 2.2)
 	var/in_use = FALSE

 /obj/item/trapdoor_kit/Initialize(mapload)
@@ -21,7 +21,7 @@
 	var/atom/result = new dry_result
 	if(!atom_target.compare_materials(result))
 		var/warning = "custom_materials of [result.type] when dried compared to just spawned don't match"
-		var/what_it_should_be = atom_target.get_materials_english_list()
+		var/what_it_should_be = atom_target.transcribe_materials_list()
 		stack_trace("[warning]. custom_materials should be [what_it_should_be].")
 	qdel(result)

@@ -31,7 +31,7 @@
 	var/atom/result = new result_typepath
 	if(!target.compare_materials(result))
 		var/warning = "custom_materials of [result.type] when microwaved compared to just spawned don't match"
-		var/what_it_should_be = target.get_materials_english_list()
+		var/what_it_should_be = target.transcribe_materials_list()
 		stack_trace("[warning]. custom_materials should be [what_it_should_be].")
 	qdel(result)

@@ -45,7 +45,7 @@
 	var/atom/movable/result = new result_atom_type
 	if(!prototype.compare_materials(result))
 		var/warning = "custom_materials of [result.type] when processed compared to just spawned don't match"
-		var/what_it_should_be = prototype.get_materials_english_list()
+		var/what_it_should_be = prototype.transcribe_materials_list()
 		//compose a text string containing the syntax and paths to use for editing the custom_materials var
 		if(result.custom_materials)
 			what_it_should_be += " (you can round values a bit)"
@@ -29,16 +29,28 @@
 /atom/proc/initialize_materials(list/materials, multiplier = 1)
 	SHOULD_NOT_OVERRIDE(TRUE)
 	if(multiplier != 1)
-		materials = materials.Copy() //avoid editing the list that was originally used as argument if it's ever going to be used again.
+		materials = materials.Copy() //avoid editing the original list since it may be cached somewhere (likely in the materials subsystem).
 		for(var/current_material in materials)
 			materials[current_material] *= multiplier

+	//Let's be sure that there are absolutely no materials in the list that aren't positive.
+	var/list/nonpos_mats
+	for(var/mat in materials)
+		if(materials[mat] <= 0)
+			LAZYADD(nonpos_mats, "[mat] = [materials[mat]]")
+			materials -= mat
+	if(length(nonpos_mats))
+		stack_trace("materials with non-positive values found in [type]: [english_list(nonpos_mats, and_text = ", ")]")
+		if(!length(materials))
+			return
+
 	sortTim(materials, GLOBAL_PROC_REF(cmp_numeric_dsc), associative = TRUE)
 	apply_material_effects(materials)

 ///proc responsible for applying material effects when setting materials.
 /atom/proc/apply_material_effects(list/materials)
 	SHOULD_CALL_PARENT(TRUE)
+
 	if(material_flags & MATERIAL_EFFECTS)
 		var/list/material_effects = get_material_effects_list(materials)
 		finalize_material_effects(material_effects)
@@ -375,10 +387,7 @@
 * Gets the most common material in the object.
 */
 /atom/proc/get_master_material()
-	var/list/cached_materials = custom_materials
-	if(!length(cached_materials))
-		return null
-	return GET_MATERIAL_REF(cached_materials[1]) //materials are sorted by amount, the first is always the main one
+	return length(custom_materials) ? GET_MATERIAL_REF(custom_materials[1]) : null //materials are sorted by amount, the first is always the main one

 /**
 * Gets the total amount of materials in this atom.
@@ -387,6 +396,16 @@
 	return isnull(custom_materials) ? 0 : counterlist_sum(custom_materials)


+///A simple proc that iterates through each material that the object is made of and spawns some stacks based on their amount and associated sheet/ore type.
+/atom/proc/drop_costum_materials(multiplier = 1)
+	for(var/datum/material/material as anything in custom_materials)
+		var/stack_type = material.sheet_type || material.ore_type
+		if(!stack_type)
+			continue
+		var/amount_to_spawn = FLOOR(custom_materials[material] / SHEET_MATERIAL_AMOUNT * multiplier, 1)
+		if(amount_to_spawn > 0)
+			new stack_type(loc, amount_to_spawn)
+
 /**
 * A bit of leeway when comparing the amount of material of two items.
 * This was made to test the material composition of items spawned via crafting/processable component and an items of the same type spawned
@@ -401,6 +420,8 @@

 /// Compares the materials of two items to see if they're roughly the same. Primarily used in crafting and processing unit tests.
 /atom/proc/compare_materials(atom/target)
+	if(custom_materials == target.custom_materials) // SSmaterials caches the combinations so we don't have to run more complex checks
+		return TRUE
 	if(length(custom_materials) != length(target.custom_materials))
 		return FALSE
 	for(var/mat in custom_materials)
@@ -415,17 +436,20 @@
 #undef COMPARISION_ACCEPTABLE_MATERIAL_DEVIATION

 /**
- * Returns a string with the materials and their respective amounts in it (eg. [list(/datum/material/meat = 100, /datum/material/plastic = 10)] )
- * also used in several unit tests.
+ * Returns a string with the materials and their respective amounts written in a way that reflects how it's displayed in the code
+ * (eg. [list(/datum/material/meat = 100, /datum/material/plastic = 10)]). Also used in several unit tests.
+ * Not to be confused with get_material_english_list()
 */
-/atom/proc/get_materials_english_list()
-	if(!custom_materials)
-		return "null"
+/atom/proc/transcribe_materials_list(list/mats_list)
+	if(!mats_list)
+		if(!custom_materials)
+			return "null"
+		mats_list = custom_materials
 	var/text = "\[list("
 	var/index = 1
-	var/mats_len = length(custom_materials)
-	for(var/datum/material/mat as anything in custom_materials)
-		text += "[mat.type] = [custom_materials[mat]]"
+	var/mats_len = length(mats_list)
+	for(var/datum/material/mat as anything in mats_list)
+		text += "[mat.type] = [mats_list[mat]]"
 		if(index < mats_len)
 			text += ", "
 		index++
@@ -9,6 +9,7 @@
 	density = TRUE
 	anchored = FALSE
 	max_integrity = 500
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 4)
 	var/state = CORE_STATE_EMPTY
 	var/datum/ai_laws/laws
 	var/obj/item/circuitboard/aicore/circuit
@@ -7,10 +7,7 @@
 	desc = "The basic construction for Nanotrasen-Always-Watching-You cameras."
 	icon = 'icons/obj/machines/camera.dmi'
 	icon_state = "cameracase"
-	custom_materials = list(
-		/datum/material/iron = SMALL_MATERIAL_AMOUNT * 4,
-		/datum/material/glass = SMALL_MATERIAL_AMOUNT * 2.5,
-	)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	result_path = /obj/machinery/camera/autoname/deconstructed
 	wall_external = TRUE

@@ -167,7 +167,7 @@
 	desc = "A device designed to detect gases and their concentration in an area."
 	icon = 'icons/obj/wallmounts.dmi'
 	icon_state = "gsensor0"
-	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT + SMALL_MATERIAL_AMOUNT * 0.3, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.2)

 /obj/item/air_sensor/Initialize(mapload, inlet, outlet)
 	. = ..()
@@ -302,6 +302,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/ordnance
 /obj/item/wallframe/telescreen/engine
 	name = "engine telescreen frame"
 	result_path = /obj/machinery/computer/security/telescreen/engine
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 7)

 MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/engine, 32)

@@ -314,6 +315,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/engine,
 /obj/item/wallframe/telescreen/turbine
 	name = "turbine telescreen frame"
 	result_path = /obj/machinery/computer/security/telescreen/turbine
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 7)

 MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/turbine, 32)

@@ -350,6 +352,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/prison,
 /obj/item/wallframe/telescreen/auxbase
 	name = "auxiliary base telescreen frame"
 	result_path = /obj/machinery/computer/security/telescreen/auxbase
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 7)

 MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/computer/security/telescreen/auxbase, 32)

@@ -6,6 +6,7 @@
 	base_icon_state = "box_"
 	density = TRUE
 	max_integrity = 250
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5)
 	/// What board do we accept
 	var/board_type = /obj/item/circuitboard
 	/// Reference to the circuit inside the frame
@@ -231,6 +231,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/defibrillator_mount, 28)
 	icon_state = "mobile"
 	anchored = FALSE
 	density = TRUE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5.15, /datum/material/silver = SHEET_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.5)

 /obj/machinery/defibrillator_mount/mobile/Initialize(mapload)
 	. = ..()
@@ -70,6 +70,7 @@
 	icon_state = "woodenbarricade"
 	resistance_flags = FLAMMABLE
 	bar_material = WOOD
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 5)
 	/// When destroyed or deconstructed, how many planks of wood does our barricade drop? Also determines how many it takes to repair the barricade and by how much.
 	var/drop_amount = 3

@@ -2444,6 +2444,7 @@
 	aiControlDisabled = AI_WIRE_DISABLED
 	req_access = list(ACCESS_BLOODCULT)
 	damage_deflection = 10
+	custom_materials = list(/datum/material/runedmetal = SHEET_MATERIAL_AMOUNT)
 	var/openingoverlaytype = /obj/effect/temp_visual/cult/door
 	var/friendly = FALSE
 	var/stealthy = FALSE
@@ -815,6 +815,7 @@
 	base_icon_state = "frame"
 	anchored = FALSE
 	density = TRUE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 3)
 	var/constructionStep = CONSTRUCTION_NO_CIRCUIT
 	var/reinforced = 0
 	/// Is this a border_only firelock? Used in several checks during construction
@@ -971,6 +972,7 @@
 	flags_1 = ON_BORDER_1
 	obj_flags = CAN_BE_HIT | IGNORE_DENSITY
 	directional = TRUE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)

 /obj/structure/firelock_frame/border_only/Initialize(mapload)
 	. = ..()
@@ -14,6 +14,7 @@
 	resistance_flags = FIRE_PROOF
 	damage_deflection = 70
 	can_open_with_hands = FALSE
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 15, /datum/material/iron = SMALL_MATERIAL_AMOUNT * 2, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 2)
 	/// The recipe for this door
 	var/datum/crafting_recipe/recipe_type = /datum/crafting_recipe/blast_doors
 	/// The current deconstruction step
@@ -9,6 +9,7 @@
 	armor_type = /datum/armor/poddoor_shutters
 	max_integrity = 100
 	recipe_type = /datum/crafting_recipe/shutters
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 5, /datum/material/iron = SMALL_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT)
 	animation_sound = 'sound/machines/shutter.ogg'
 	show_nav_computer_icon = FALSE

@@ -37,6 +38,7 @@

 /obj/machinery/door/poddoor/shutters/preopen/deconstructed
 	deconstruction = BLASTDOOR_NEEDS_WIRES
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 5)

 /obj/machinery/door/poddoor/shutters/indestructible
 	name = "hardened shutters"
@@ -10,6 +10,7 @@
 	armor_type = /datum/armor/machinery_igniter
 	resistance_flags = FIRE_PROOF
 	processing_flags = NONE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5 + HALF_SHEET_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
 	var/id = null
 	var/on = FALSE

@@ -24,6 +24,7 @@
 	mouse_drag_pointer = MOUSE_ACTIVE_POINTER
 	use_power = NO_POWER_USE
 	interaction_flags_mouse_drop = NEED_HANDS
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.1, /datum/material/plastic = SHEET_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.2)

 	/// Information and effects about where the IV drip is attached to
 	var/datum/iv_drip_attachment/attachment
@@ -19,6 +19,7 @@ Buildable meters
 	icon_state_preview = "manifold4w"
 	inhand_icon_state = "buildpipe"
 	w_class = WEIGHT_CLASS_NORMAL
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	///Piping layer that we are going to be on
 	var/piping_layer = PIPING_LAYER_DEFAULT
 	///Type of pipe-object made, selected from the RPD
@@ -42,65 +43,100 @@ Buildable meters

 /obj/item/pipe/directional
 	RPD_type = PIPE_UNARY
+
 /obj/item/pipe/directional/he_junction
 	icon_state_preview = "junction"
 	pipe_type = /obj/machinery/atmospherics/pipe/heat_exchanging/junction
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/directional/vent
 	name = "air vent fitting"
 	icon_state_preview = "uvent"
 	pipe_type = /obj/machinery/atmospherics/components/unary/vent_pump
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6 + SMALL_MATERIAL_AMOUNT / 2, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/directional/scrubber
 	name = "air scrubber fitting"
 	icon_state_preview = "scrubber"
 	pipe_type = /obj/machinery/atmospherics/components/unary/vent_scrubber
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6 + SMALL_MATERIAL_AMOUNT / 2, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/directional/connector
 	icon_state_preview = "connector"
 	pipe_type = /obj/machinery/atmospherics/components/unary/portables_connector
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/directional/passive_vent
 	icon_state_preview = "pvent"
 	pipe_type = /obj/machinery/atmospherics/components/unary/passive_vent
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/directional/injector
 	icon_state_preview = "injector"
 	pipe_type = /obj/machinery/atmospherics/components/unary/outlet_injector
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/directional/he_exchanger
 	icon_state_preview = "heunary"
 	pipe_type = /obj/machinery/atmospherics/components/unary/heat_exchanger
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT, /datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT)
+
 /obj/item/pipe/directional/airlock_pump
 	icon_state_preview = "airlock_pump"
 	pipe_type = /obj/machinery/atmospherics/components/unary/airlock_pump
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.7)
+
 /obj/item/pipe/binary
 	RPD_type = PIPE_STRAIGHT
+
 /obj/item/pipe/binary/layer_adapter
 	icon_state_preview = "manifoldlayer"
 	pipe_type = /obj/machinery/atmospherics/pipe/layer_manifold
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/binary/color_adapter
 	icon_state_preview = "adapter_center"
 	pipe_type = /obj/machinery/atmospherics/pipe/color_adapter
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/binary/pressure_pump
 	icon_state_preview = "pump"
 	pipe_type = /obj/machinery/atmospherics/components/binary/pump
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/binary/manual_valve
 	icon_state_preview = "mvalve"
 	pipe_type = /obj/machinery/atmospherics/components/binary/valve
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
+
 /obj/item/pipe/binary/bendable
 	RPD_type = PIPE_BENDABLE
+
 /obj/item/pipe/trinary
 	RPD_type = PIPE_TRINARY
+
 /obj/item/pipe/trinary/flippable
 	RPD_type = PIPE_TRIN_M
 	var/flipped = FALSE
+
 /obj/item/pipe/trinary/flippable/filter
 	name = "gas filter fitting"
 	icon_state_preview = "filter"
 	pipe_type = /obj/machinery/atmospherics/components/trinary/filter
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/trinary/flippable/mixer
 	icon_state_preview = "mixer"
 	pipe_type = /obj/machinery/atmospherics/components/trinary/mixer
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6, /datum/material/glass = SMALL_MATERIAL_AMOUNT / 2)
+
 /obj/item/pipe/quaternary
 	RPD_type = PIPE_ONEDIR
+
 /obj/item/pipe/quaternary/pipe
 	icon_state_preview = "manifold4w"
 	pipe_type = /obj/machinery/atmospherics/pipe/smart
+
 /obj/item/pipe/quaternary/pipe/crafted

 /obj/item/pipe/quaternary/pipe/crafted/Initialize(mapload, _pipe_type, _dir, obj/machinery/atmospherics/make_from, device_color, device_init_dir = SOUTH)
@@ -114,6 +150,7 @@ Buildable meters
 /obj/item/pipe/quaternary/he_pipe
 	icon_state_preview = "he_manifold4w"
 	pipe_type = /obj/machinery/atmospherics/pipe/heat_exchanging/manifold4w
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)

 /obj/item/pipe/Initialize(mapload, _pipe_type, _dir, obj/machinery/atmospherics/make_from, device_color, device_init_dir = SOUTH)
 	if(make_from)
@@ -17,6 +17,7 @@
 	density = TRUE
 	obj_flags = UNIQUE_RENAME | RENAME_NO_DESC
 	use_power = NO_POWER_USE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5)
 	var/build_step = PTURRET_UNSECURED //the current step in the building process
 	var/finish_name = "turret" //the name applied to the product turret
 	var/obj/item/gun/installed_gun = null
@@ -210,4 +210,4 @@
 	icon = 'icons/obj/machines/turret_control.dmi'
 	icon_state = "control_frame"
 	result_path = /obj/machinery/turretid
-	custom_materials = list(/datum/material/iron= SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6)
@@ -547,6 +547,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/requests_console/auto_name, 30)
 	icon_state = "req_comp_off"
 	result_path = /obj/machinery/requests_console/auto_name
 	pixel_shift = 30
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 7)

 /datum/aas_config_entry/rc_emergency
 	name = "RC Alert: Emergency Request"
@@ -324,6 +324,7 @@
 	cell = null
 	interaction_flags_click = FORBID_TELEKINESIS_REACH
 	settable_temperature_range = 50
+	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT * 3, /datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
 	///The beaker within the heater
 	var/obj/item/reagent_containers/beaker = null
 	/// How quickly it delivers heat to the reagents. In watts per joule of the thermal energy difference of the reagent from the temperature difference of the current and target temperatures.
@@ -15,6 +15,7 @@
 	subsystem_type = /datum/controller/subsystem/processing/fastprocess
 	interaction_flags_machine = INTERACT_MACHINE_WIRES_IF_OPEN | INTERACT_MACHINE_OFFLINE
 	use_power = NO_POWER_USE
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 10)

 	/// What is the lowest amount of time we can set the timer to?
 	var/minimum_timer = SYNDIEBOMB_MIN_TIMER_SECONDS
@@ -356,6 +357,7 @@
 	w_class = WEIGHT_CLASS_NORMAL
 	flags_1 = PREVENT_CONTENTS_EXPLOSION_1 // We detonate upon being exploded.
 	resistance_flags = FLAMMABLE //Burnable (but the casing isn't)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2.05)
 	var/adminlog = null
 	var/range_heavy = 3
 	var/range_medium = 9
@@ -8,6 +8,7 @@
 	resistance_flags = FLAMMABLE
 	obj_flags = CAN_BE_HIT
 	item_flags = NO_PIXEL_RANDOM_DROP
+	custom_materials = list(/datum/material/cardboard = SHEET_MATERIAL_AMOUNT * 5)
 	/// If the cutout is pushed over and has to be righted
 	var/pushed_over = FALSE
 	/// If the cutout actually appears as what it portray and not a discolored version
@@ -2058,6 +2058,7 @@
 	worn_icon_state = "nothing"
 	resistance_flags = FLAMMABLE
 	slot_flags = ITEM_SLOT_ID
+	custom_materials = list(/datum/material/cardboard = SHEET_MATERIAL_AMOUNT)
 	///The "name" of the "owner" of this "ID"
 	var/scribbled_name
 	///The assignment written on this card.
@@ -24,6 +24,7 @@
 	actions_types = list(/datum/action/item_action/startchainsaw)
 	tool_behaviour = TOOL_SAW
 	toolspeed = 1.5 //Turn it on first you dork
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5, /datum/material/alloy/plasteel =  SHEET_MATERIAL_AMOUNT * 5, /datum/material/glass =  SHEET_MATERIAL_AMOUNT * 3)
 	var/force_on = 24
 	/// The looping sound for our chainsaw when running
 	var/datum/looping_sound/chainsaw/chainsaw_loop
@@ -163,7 +163,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 	name = "firebrand"
 	desc = "An unlit firebrand. It makes you wonder why it's not just called a stick."
 	smoketime = 40 SECONDS
-	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 2)
 	grind_results = list(/datum/reagent/carbon = 2)

 /obj/item/match/firebrand/Initialize(mapload)
@@ -175,6 +175,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 	desc = "A budget lighter done by using a battery and some aluminium. Hold tightly to ignite."
 	icon_state = "battery_unlit"
 	base_icon_state = "battery"
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 7, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)

 /obj/item/match/battery/attack_self(mob/living/user, modifiers)
 	. = ..()
@@ -932,6 +933,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 	list_reagents = null
 	w_class = WEIGHT_CLASS_SMALL
 	choke_forever = TRUE
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 2)
 	///name of the stuff packed inside this pipe
 	var/packeditem

@@ -1009,7 +1011,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 	inhand_icon_on = null
 	inhand_icon_off = null
 	lung_harm = 2
-	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT * 3)

 ///////////
 //ROLLING//
@@ -229,6 +229,7 @@
 	inhand_icon_state = "gold_horn"
 	worn_icon_state = "horn_gold"
 	COOLDOWN_DECLARE(golden_horn_cooldown)
+	custom_materials = list(/datum/material/bananium = SHEET_MATERIAL_AMOUNT * 5)

 /obj/item/bikehorn/golden/attack()
 	flip_mobs()
@@ -35,12 +35,14 @@
 	desc = "A stylish upgrade (?) to the intelliCard."
 	icon_state = "aitater"
 	base_icon_state = "aitater"
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)

 /obj/item/aicard/aispook
 	name = "intelliLantern"
 	desc = "A spoOoOoky upgrade to the intelliCard."
 	icon_state = "aispook"
 	base_icon_state = "aispook"
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)

 /obj/item/aicard/suicide_act(mob/living/user)
 	user.visible_message(span_suicide("[user] is trying to upload [user.p_them()]self into [src]! That's not going to work out well!"))
@@ -9,6 +9,7 @@
 	icon_state = "pressureplate"
 	layer = ABOVE_OPEN_TURF_LAYER
 	plane = FLOOR_PLANE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.75, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.7)
 	var/trigger_mob = TRUE
 	var/trigger_item = FALSE
 	var/specific_item = null
@@ -197,7 +197,7 @@
 	icon_state = "intercom"
 	result_path = /obj/item/radio/intercom/unscrewed
 	pixel_shift = 26
-	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.75, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.25)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)

 MAPPING_DIRECTIONAL_HELPERS(/obj/item/radio/intercom, 27)

@@ -404,6 +404,7 @@ effective or pretty fucking useless.
 	desc = "A jury-rigged device that disrupts nearby radio communication. Its crude construction provides a significantly smaller area of effect compared to its Syndicate counterpart."
 	range = 5
 	disruptor_range = 3
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)

 /obj/item/jammer/makeshift/Initialize(mapload)
 	. = ..()
@@ -162,7 +162,7 @@
 	throwforce = 1
 	w_class = WEIGHT_CLASS_SMALL
 	force = 3
-	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.4)
+	custom_materials = null
 	max_water = 30
 	sprite_name = "coolant"
 	dog_fashion = null
@@ -83,6 +83,7 @@ GLOBAL_DATUM(bridge_axe, /obj/item/fireaxe)
 	icon_angle = 180
 	force_unwielded = 5
 	force_wielded = 23
+	custom_materials = list(/datum/material/bone = SHEET_MATERIAL_AMOUNT * 6)

 /*
 * Metal Hydrogen Axe
@@ -12,7 +12,7 @@
 	throw_speed = 1
 	throw_range = 5
 	w_class = WEIGHT_CLASS_NORMAL
-	custom_materials = list(/datum/material/iron= HALF_SHEET_MATERIAL_AMOUNT * 0.5)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.05, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.8)
 	resistance_flags = FIRE_PROOF
 	trigger_guard = TRIGGER_GUARD_NORMAL
 	light_system = OVERLAY_LIGHT
@@ -103,6 +103,7 @@
 	icon_state = "flatcart"
 	density = TRUE
 	opacity = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 8, /datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT)

 /obj/structure/flatpack_cart/Initialize(mapload)
 	. = ..()
@@ -87,6 +87,7 @@
 	tastes = list("cheese" = 4, "royalty" = 1)
 	rat_heal = 70
 	crafting_complexity = FOOD_COMPLEXITY_3
+	custom_materials = list(/datum/material/gold = SHEET_MATERIAL_AMOUNT * 5)

 //Curd cheese, a general term which I will now proceed to stretch as thin as the toppings on a supermarket sandwich:
 //I'll use it as a substitute for ricotta, cottage cheese and quark, as well as any other non-aged, soft grainy cheese
@@ -270,6 +270,7 @@
 	tastes = list("bread" = 1, "meat" = 1, "tomato sauce" = 1, "death" = 1)
 	foodtypes = MEAT|VEGETABLES|GRAIN
 	eat_time = 4 SECONDS // Makes it harder to force-feed this to people as a weapon, as funny as that is.
+	custom_materials = list(/datum/material/meat = MEATSLAB_MATERIAL_AMOUNT * 2)
 	var/static/list/correct_clothing = list(/obj/item/clothing/under/rank/civilian/cookjorts, /obj/item/clothing/under/shorts/jeanshorts)

 /obj/item/food/sandwich/death/Initialize(mapload)
@@ -6,6 +6,7 @@
 	inhand_icon_state = "flashbang"
 	w_class = WEIGHT_CLASS_SMALL
 	force = 2
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	/// Which stage of construction this grenade is currently at.
 	var/stage = GRENADE_EMPTY
 	/// The set of reagent containers that have been added to this grenade casing.
@@ -16,6 +16,7 @@
 	shrapnel_type = /obj/projectile/bullet/shrapnel/ied
 	det_time = 225 SECONDS //this is handled by assemblies now
 	display_timer = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.65, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 2)
 	/// Explosive power
 	var/power = 5
 	/// Our assembly that when activated causes us to explode
@@ -14,6 +14,7 @@
 	w_class = WEIGHT_CLASS_BULKY
 	drop_sound = 'sound/items/handling/ammobox_drop.ogg'
 	pickup_sound = 'sound/items/handling/ammobox_pickup.ogg'
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6)
 	/// How many times we can use this maintenance kit to maintain a gun
 	var/uses = 3
 	/// THe maximum uses, used for our examine text.
@@ -208,7 +208,7 @@
 	var/cable_color = CABLE_COLOR_RED
 	lefthand_file = 'icons/mob/inhands/equipment/tools_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/tools_righthand.dmi'
-	custom_materials = list(/datum/material/iron= SMALL_MATERIAL_AMOUNT * 1.5, /datum/material/glass= SMALL_MATERIAL_AMOUNT * 0.75)
+	custom_materials = list(/datum/material/iron= SMALL_MATERIAL_AMOUNT * 1.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.5)
 	breakouttime = 30 SECONDS
 	cuffsound = 'sound/items/weapons/cablecuff.ogg'
 	pickup_sound = null
@@ -572,6 +572,7 @@
 	righthand_file = 'icons/mob/inhands/weapons/thrown_righthand.dmi'
 	breakouttime = 3.5 SECONDS//easy to apply, easy to break out of
 	gender = NEUTER
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6.1, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.5)
 	///Amount of time to knock the target down for once it's hit in deciseconds.
 	var/knockdown = 0
 	///Reference of the mob we will attempt to snare
@@ -624,6 +625,7 @@
 	inhand_icon_state = "bola_r"
 	breakouttime = 7 SECONDS
 	knockdown = 3.5 SECONDS
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 6.1, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.7)

 /**
 * A security variant of the bola.
@@ -639,6 +641,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	breakouttime = 6 SECONDS
 	custom_price = PAYCHECK_COMMAND * 0.35
+	custom_materials = null

 /obj/item/restraints/legcuffs/bola/energy/Initialize(mapload)
 	. = ..()
@@ -336,6 +336,7 @@
 	icon_state = "bananium_inspector"
 	w_class = WEIGHT_CLASS_SMALL
 	max_mode = BANANIUM_CLOWN_INSPECTOR_PRINT_SOUND_MODE_LAST
+	custom_materials = list(/datum/material/bananium = SHEET_MATERIAL_AMOUNT * 5)
 	///How many more times can we print?
 	var/paper_charges = 32
 	///Max value of paper_charges
@@ -167,7 +167,7 @@
 	throwforce = 5
 	throw_speed = 3
 	throw_range = 7
-	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 1.5)
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 2)
 	resistance_flags = FLAMMABLE
 	w_class = WEIGHT_CLASS_NORMAL
 	attack_verb_continuous = list("bashes", "batters", "bludgeons", "thrashes", "whacks")
@@ -217,7 +217,7 @@
 	obj_flags = parent_type::obj_flags & ~CONDUCTS_ELECTRICITY
 	force = 15
 	throwforce = 15
-	custom_materials = null
+	custom_materials = list(/datum/material/bone = SHEET_MATERIAL_AMOUNT * 2)

 /datum/embedding/combat_knife/weak
 	embed_chance = 35
@@ -245,7 +245,7 @@
 	attack_verb_continuous = list("shanks", "shivs")
 	attack_verb_simple = list("shank", "shiv")
 	armor_type = /datum/armor/none
-	custom_materials = list(/datum/material/glass = SMALL_MATERIAL_AMOUNT * 4)
+	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT)

 /obj/item/knife/shiv/make_stabby()
 	AddComponent(/datum/component/alternative_sharpness, SHARP_POINTY, alt_continuous, alt_simple, -3)
@@ -258,7 +258,7 @@
 	force = 9
 	throwforce = 13
 	armor_type = /datum/armor/shiv_plasma
-	custom_materials = list(/datum/material/glass=SMALL_MATERIAL_AMOUNT *4, /datum/material/plasma=SMALL_MATERIAL_AMOUNT * 2)
+	custom_materials = list(/datum/material/alloy/plasmaglass = SHEET_MATERIAL_AMOUNT)

 /datum/armor/shiv_plasma
 	melee = 25
@@ -278,7 +278,7 @@
 	throw_range = 7
 	wound_bonus = 10
 	armor_type = /datum/armor/shiv_titanium
-	custom_materials = list(/datum/material/glass=SMALL_MATERIAL_AMOUNT * 4, /datum/material/titanium=SMALL_MATERIAL_AMOUNT * 2)
+	custom_materials = list(/datum/material/alloy/titaniumglass = SHEET_MATERIAL_AMOUNT)

 /datum/armor/shiv_titanium
 	melee = 25
@@ -301,7 +301,7 @@
 	wound_bonus = 10
 	exposed_wound_bonus = 20
 	armor_type = /datum/armor/shiv_plastitanium
-	custom_materials = list(/datum/material/glass= SMALL_MATERIAL_AMOUNT * 4, /datum/material/alloy/plastitanium= SMALL_MATERIAL_AMOUNT * 2)
+	custom_materials = list(/datum/material/alloy/plastitaniumglass = SHEET_MATERIAL_AMOUNT)

 /datum/armor/shiv_plastitanium
 	melee = 50
@@ -15,6 +15,7 @@
 	w_class = WEIGHT_CLASS_TINY
 	throw_speed = 1
 	throw_range = 7
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.2, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.2)
 	var/state = DEFLATED
 	var/datum/gas_mixture/air_contents = null

@@ -836,6 +836,7 @@
 	slot_flags = ITEM_SLOT_BACK
 	convertible = FALSE
 	active_changes_inhand = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.15, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 2)
 	var/obj/item/assembly/igniter/sparkler
 	///Determines whether or not we can improve the cattleprod into a new type. Prevents turning the cattleprod subtypes into different subtypes, or wasting materials on making it....another version of itself.
 	var/can_upgrade = TRUE
@@ -925,6 +926,7 @@
 	inhand_icon_state = "teleprod"
 	slot_flags = null
 	can_upgrade = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.15, /datum/material/bluespace = SHEET_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 2)

 /obj/item/melee/baton/security/cattleprod/teleprod/clumsy_check(mob/living/carbon/human/user)
 	. = ..()
@@ -75,6 +75,7 @@
 	icon_state = "tailwhip"
 	inhand_icon_state = "tailwhip"
 	item_flags = NONE
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.1, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.1)

 /obj/item/melee/chainofcommand/tailwhip/kitty
 	name = "cat o' nine tails"
@@ -243,6 +243,7 @@
 	armour_penetration = 1000
 	force_string = "INFINITE"
 	item_flags = NEEDS_PERMIT|NO_BLOOD_ON_ITEM
+	custom_materials = list(/datum/material/adamantine = SHEET_MATERIAL_AMOUNT * 20, /datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	var/obj/machinery/power/supermatter_crystal/shard
 	var/balanced = 1

@@ -220,6 +220,7 @@ GLOBAL_LIST_EMPTY(sniffable_sheets)
 	desc = "A handheld tracking device that locates sheets of glass and iron."
 	icon_state = "pinpointer_sniffer"
 	worn_icon_state = "pinpointer_black"
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.8, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.7)

 /obj/item/pinpointer/material_sniffer/scan_for_target()
 	if(target || !GLOB.sniffable_sheets.len)
@@ -20,6 +20,7 @@
 	lefthand_file = 'icons/mob/inhands/weapons/guns_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/weapons/guns_righthand.dmi'
 	armor_type = /datum/armor/item_pneumatic_cannon
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 6)
 	var/maxWeightClass = 20 //The max weight of items that can fit into the cannon
 	var/loadedWeightClass = 0 //The weight of items currently in the cannon
 	var/obj/item/tank/internals/tank = null //The gas tank that is drawn from to fire things
@@ -324,6 +324,7 @@
 	max_amount = 30
 	name = "makeshift rapid pipe cleaner layer"
 	ghetto = TRUE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 15)

 /obj/item/rcl/ghetto/update_icon_state()
 	if(!loaded)
@@ -9,6 +9,7 @@
 	attack_verb_simple = list("forcefully inspire", "violently encourage", "relentlessly galvanize")
 	lefthand_file = 'icons/mob/inhands/equipment/banners_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/banners_righthand.dmi'
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	var/inspiration_available = TRUE //If this banner can be used to inspire crew
 	var/morale_time = 0
 	var/morale_cooldown = 600 //How many deciseconds between uses
@@ -117,7 +117,7 @@
 	desc = "A medieval wooden buckler."
 	icon_state = "buckler"
 	inhand_icon_state = "buckler"
-	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 10)
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 20)
 	resistance_flags = FLAMMABLE
 	block_chance = 30
 	max_integrity = 55
@@ -131,6 +131,7 @@
 	block_chance = 40
 	max_integrity = 40
 	w_class = WEIGHT_CLASS_NORMAL
+	custom_materials = null

 /obj/item/shield/kite
 	name = "kite shield"
@@ -167,7 +168,7 @@
 	desc = "A shield adept at blocking blunt objects from connecting with the torso of the shield wielder, less so bullets and laser beams."
 	icon_state = "riot"
 	inhand_icon_state = "riot"
-	custom_materials = list(/datum/material/glass= SHEET_MATERIAL_AMOUNT * 3.75, /datum/material/iron= HALF_SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass= SHEET_MATERIAL_AMOUNT * 4.05, /datum/material/iron = SHEET_MATERIAL_AMOUNT * 2.8)
 	transparent = TRUE
 	max_integrity = 75
 	shield_break_sound = 'sound/effects/glass/glassbr3.ogg'
@@ -203,6 +204,7 @@
 	icon_state = "flashshield"
 	inhand_icon_state = "flashshield"
 	var/obj/item/assembly/flash/handheld/embedded_flash = /obj/item/assembly/flash/handheld
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5.1, /datum/material/glass= SHEET_MATERIAL_AMOUNT * 4.35)

 /obj/item/shield/riot/flash/Initialize(mapload)
 	. = ..()
@@ -479,7 +481,7 @@
 	desc = "A crude shield made out of several sheets of iron taped together, not very durable."
 	icon_state = "improvised"
 	inhand_icon_state = "improvised"
-	custom_materials = list(/datum/material/iron = HALF_SHEET_MATERIAL_AMOUNT * 2)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 10)
 	max_integrity = 35
 	shield_break_leftover = /obj/item/stack/rods/two
 	armor_type = /datum/armor/item_shield/improvised
@@ -10,7 +10,7 @@
 	attack_verb_continuous = list("bashes", "smacks")
 	attack_verb_simple = list("bash", "smack")
 	resistance_flags = FLAMMABLE
-
+	custom_materials = list(/datum/material/cardboard = SHEET_MATERIAL_AMOUNT * 2, /datum/material/iron = HALF_SHEET_MATERIAL_AMOUNT)
 	var/label = ""
 	COOLDOWN_DECLARE(picket_sign_cooldown)

@@ -10,6 +10,7 @@
 	w_class = WEIGHT_CLASS_NORMAL
 	attack_verb_continuous = list("smacks", "whacks", "slams", "smashes")
 	attack_verb_simple = list("smack", "whack", "slam", "smash")
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 10)
 	///The vehicle counterpart for the board
 	var/board_item_type = /obj/vehicle/ridden/scooter/skateboard

@@ -16,7 +16,7 @@
 	demolition_mod = 0.75 // Note: This is significant, as this needs to be low enough that any possible force adjustments from better spears does not go over airlock deflection. See AIRLOCK_DAMAGE_DEFLECTION_N.
 	embed_type = /datum/embedding/spear
 	armour_penetration = 5
-	custom_materials = list(/datum/material/iron = HALF_SHEET_MATERIAL_AMOUNT, /datum/material/glass= HALF_SHEET_MATERIAL_AMOUNT * 2)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 0.65, /datum/material/glass= SHEET_MATERIAL_AMOUNT * 1.15)
 	hitsound = 'sound/items/weapons/bladeslice.ogg'
 	attack_verb_continuous = list("attacks", "pokes", "jabs", "tears", "lacerates", "gores")
 	attack_verb_simple = list("attack", "poke", "jab", "tear", "lacerate", "gore")
@@ -96,7 +96,6 @@
 		if(/obj/item/shard/plasma)
 			force = 11
 			throwforce = 21
-			custom_materials = list(/datum/material/iron= HALF_SHEET_MATERIAL_AMOUNT, /datum/material/alloy/plasmaglass= HALF_SHEET_MATERIAL_AMOUNT * 2)
 			icon_prefix = "spearplasma"
 			modify_max_integrity(220)
 			wound_bonus = -10
@@ -115,7 +114,6 @@
 			throwforce = 22
 			throw_range = 8
 			throw_speed = 5
-			custom_materials = list(/datum/material/iron= HALF_SHEET_MATERIAL_AMOUNT, /datum/material/alloy/titaniumglass= HALF_SHEET_MATERIAL_AMOUNT * 2)
 			modify_max_integrity(230)
 			wound_bonus = -5
 			force_unwielded = 12
@@ -135,7 +133,6 @@
 			throwforce = 23
 			throw_range = 9
 			throw_speed = 5
-			custom_materials = list(/datum/material/iron= HALF_SHEET_MATERIAL_AMOUNT, /datum/material/alloy/plastitaniumglass= HALF_SHEET_MATERIAL_AMOUNT * 2)
 			modify_max_integrity(240)
 			wound_bonus = 0
 			exposed_wound_bonus = 20
@@ -307,7 +304,7 @@
 	icon_prefix = "bone_spear"
 	throwforce = 22
 	armour_penetration = 20 //Enhanced armor piercing
-	custom_materials = list(/datum/material/bone = HALF_SHEET_MATERIAL_AMOUNT * 7)
+	custom_materials = list(/datum/material/bone = SHEET_MATERIAL_AMOUNT * 4)
 	force_unwielded = 12
 	force_wielded = 20
 	spear_leftovers = /obj/item/stack/sheet/bone
@@ -331,7 +328,7 @@
 	desc = "A haphazardly-constructed bamboo stick with a sharpened tip, ready to poke holes into unsuspecting people."

 	throwforce = 23	//Better to throw
-	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 20)
+	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 25)
 	spear_leftovers = /obj/item/stack/sheet/mineral/bamboo

 /obj/item/spear/bamboospear/add_headpike_component()
@@ -11,7 +11,7 @@ GLOBAL_LIST_INIT(rod_recipes, list ( \
 	new/datum/stack_recipe("ladder", /obj/structure/ladder/crafted, 15, time = 15 SECONDS, crafting_flags = CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_STRUCTURE), \
 	new/datum/stack_recipe("catwalk floor tile", /obj/item/stack/tile/catwalk_tile, 1, 4, 20, category = CAT_TILES), \
 	new/datum/stack_recipe("stairs frame", /obj/structure/stairs_frame, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_STRUCTURE), \
-	new/datum/stack_recipe("probing cane", /obj/item/cane/white, 3, time = 1 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY, category = CAT_TOOLS), \
+	new/datum/stack_recipe("probing cane", /obj/item/cane/white, 3, time = 1 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_TOOLS), \
 	new/datum/stack_recipe("sharpened iron rod", /obj/item/ammo_casing/rebar, 1, time = 0.2 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY, category = CAT_WEAPON_AMMO), \
 	))

@@ -28,7 +28,7 @@ GLOBAL_LIST_INIT(rod_recipes, list ( \
 	throw_speed = 3
 	throw_range = 7
 	demolition_mod = 1.25
-	mats_per_unit = list(/datum/material/iron=HALF_SHEET_MATERIAL_AMOUNT)
+	mats_per_unit = list(/datum/material/iron = HALF_SHEET_MATERIAL_AMOUNT)
 	max_amount = 50
 	attack_verb_continuous = list("hits", "bludgeons", "whacks")
 	attack_verb_simple = list("hit", "bludgeon", "whack")
@@ -146,7 +146,7 @@ GLOBAL_LIST_INIT(reinforced_glass_recipes, list ( \
 	null, \
 	new/datum/stack_recipe("directional reinforced window", /obj/structure/window/reinforced/unanchored, time = 0.5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_CHECK_DIRECTION, category = CAT_WINDOWS), \
 	new/datum/stack_recipe("fulltile reinforced window", /obj/structure/window/reinforced/fulltile/unanchored, 2, time = 2 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_IS_FULLTILE, category = CAT_WINDOWS), \
-	new/datum/stack_recipe("glass shard", /obj/item/shard, time = 10, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND, category = CAT_MISC), \
+	new/datum/stack_recipe("glass shard", /obj/item/shard, time = 10, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_MISC), \
 	new/datum/stack_recipe("reinforced glass tile", /obj/item/stack/tile/rglass, 1, 4, 20, category = CAT_TILES) \
 ))

@@ -185,7 +185,7 @@ GLOBAL_LIST_INIT(reinforced_glass_recipes, list ( \
 GLOBAL_LIST_INIT(prglass_recipes, list ( \
 	new/datum/stack_recipe("directional reinforced window", /obj/structure/window/reinforced/plasma/unanchored, time = 0.5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_CHECK_DIRECTION, category = CAT_WINDOWS), \
 	new/datum/stack_recipe("fulltile reinforced window", /obj/structure/window/reinforced/plasma/fulltile/unanchored, 2, time = 2 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_IS_FULLTILE, category = CAT_WINDOWS), \
-	new/datum/stack_recipe("plasma glass shard", /obj/item/shard/plasma, time = 40, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND, category = CAT_MISC), \
+	new/datum/stack_recipe("plasma glass shard", /obj/item/shard/plasma, time = 40, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_SKIP_MATERIALS_PARITY, category = CAT_MISC), \
 	new/datum/stack_recipe("reinforced plasma glass tile", /obj/item/stack/tile/rglass/plasma, 1, 4, 20, category = CAT_TILES) \
 ))

@@ -377,6 +377,7 @@ GLOBAL_LIST_INIT(plastitaniumglass_recipes, list(
 		to_chat(user, span_notice("You begin to wrap the [cloth] around the [src]..."))
 		if(do_after(user, craft_time, target = src))
 			var/obj/item/knife/shiv/shiv = new shiv_type
+			shiv.set_custom_materials(custom_materials)
 			cloth.use(1)
 			to_chat(user, span_notice("You wrap the [cloth] around the [src], forming a makeshift weapon."))
 			remove_item_from_storage(src, user)
@@ -12,6 +12,7 @@
 	obj_flags = CONDUCTS_ELECTRICITY
 	max_amount = 60
 	grind_results = list(/datum/reagent/silicon = 20, /datum/reagent/copper = 5)
+	mats_per_unit = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.05, /datum/material/glass = SHEET_MATERIAL_AMOUNT * 1.05)
 	merge_type = /obj/item/stack/light_w

 /obj/item/stack/light_w/examine(mob/user)
@@ -24,9 +24,9 @@ Mineral Sheets
 */

 GLOBAL_LIST_INIT(sandstone_recipes, list ( \
-	new/datum/stack_recipe("sandstone door", /obj/structure/mineral_door/sandstone, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("sandstone door", /obj/structure/mineral_door/sandstone, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("sandstone platform", /obj/structure/platform/sandstone, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
-	new/datum/stack_recipe("Breakdown into sand", /obj/item/stack/ore/glass, 1, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND, category = CAT_MISC), \
+	new/datum/stack_recipe("Breakdown into sand", /obj/item/stack/ore/glass, 1, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ON_SOLID_GROUND | CRAFT_NO_MATERIALS, category = CAT_MISC), \
 ))

 /obj/item/stack/sheet/mineral/sandstone
@@ -108,7 +108,7 @@ GLOBAL_LIST_INIT(sandbag_recipes, list ( \
 	walltype = /turf/closed/wall/mineral/diamond

 GLOBAL_LIST_INIT(diamond_recipes, list ( \
-	new/datum/stack_recipe("diamond door", /obj/structure/mineral_door/transparent/diamond, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("diamond door", /obj/structure/mineral_door/transparent/diamond, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("diamond tile", /obj/item/stack/tile/mineral/diamond, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES),  \
 	))

@@ -139,7 +139,7 @@ GLOBAL_LIST_INIT(diamond_recipes, list ( \
 	walltype = /turf/closed/wall/mineral/uranium

 GLOBAL_LIST_INIT(uranium_recipes, list ( \
-	new/datum/stack_recipe("uranium door", /obj/structure/mineral_door/uranium, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("uranium door", /obj/structure/mineral_door/uranium, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("depleted uranium platform", /obj/structure/platform/uranium, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
 	new/datum/stack_recipe("uranium tile", /obj/item/stack/tile/mineral/uranium, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES), \
 	))
@@ -180,7 +180,7 @@ GLOBAL_LIST_INIT(uranium_recipes, list ( \
 	return TOXLOSS//dont you kids know that stuff is toxic?

 GLOBAL_LIST_INIT(plasma_recipes, list ( \
-	new/datum/stack_recipe("plasma door", /obj/structure/mineral_door/transparent/plasma, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("plasma door", /obj/structure/mineral_door/transparent/plasma, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("plasma tile", /obj/item/stack/tile/mineral/plasma, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES), \
 	))

@@ -214,7 +214,7 @@ GLOBAL_LIST_INIT(plasma_recipes, list ( \
 	walltype = /turf/closed/wall/mineral/gold

 GLOBAL_LIST_INIT(gold_recipes, list ( \
-	new/datum/stack_recipe("golden door", /obj/structure/mineral_door/gold, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("golden door", /obj/structure/mineral_door/gold, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("golden platform", /obj/structure/platform/gold, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
 	new/datum/stack_recipe("gold tile", /obj/item/stack/tile/mineral/gold, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES), \
 	new/datum/stack_recipe("blank plaque", /obj/item/plaque, 1, crafting_flags = NONE, category = CAT_FURNITURE), \
@@ -246,7 +246,7 @@ GLOBAL_LIST_INIT(gold_recipes, list ( \
 	walltype = /turf/closed/wall/mineral/silver

 GLOBAL_LIST_INIT(silver_recipes, list ( \
-	new/datum/stack_recipe("silver door", /obj/structure/mineral_door/silver, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("silver door", /obj/structure/mineral_door/silver, 10, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("silver platform", /obj/structure/platform/silver, 2, time = 3 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, trait_booster = TRAIT_QUICK_BUILD, trait_modifier = 0.75, category = CAT_STRUCTURE), \
 	new/datum/stack_recipe("silver tile", /obj/item/stack/tile/mineral/silver, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES), \
 	))
@@ -145,7 +145,7 @@ GLOBAL_LIST_INIT(metal_recipes, list ( \
 	new/datum/stack_recipe("tram controller frame", /obj/item/wallframe/tram, 20, crafting_flags = NONE, category = CAT_STRUCTURE), \
 	new/datum/stack_recipe("tram display frame", /obj/item/wallframe/indicator_display, 7, crafting_flags = NONE, category = CAT_STRUCTURE), \
 	null, \
-	new/datum/stack_recipe("iron door", /obj/structure/mineral_door/iron, 20, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND | CRAFT_APPLIES_MATS, category = CAT_DOORS), \
+	new/datum/stack_recipe("iron door", /obj/structure/mineral_door/iron, 20, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_DOORS), \
 	new/datum/stack_recipe("filing cabinet", /obj/structure/filingcabinet, 2, time = 10 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_FURNITURE), \
 	new/datum/stack_recipe("desk bell", /obj/structure/desk_bell, 2, time = 3 SECONDS, crafting_flags = NONE, category = CAT_FURNITURE), \
 	new/datum/stack_recipe("floodlight frame", /obj/structure/floodlight_frame, 5, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_STRUCTURE), \
@@ -373,7 +373,7 @@ GLOBAL_LIST_INIT(wood_recipes, list ( \
 	new/datum/stack_recipe("rake", /obj/item/cultivator/rake, 5, time = 1 SECONDS, crafting_flags = NONE, category = CAT_TOOLS),\
 	new/datum/stack_recipe("ore box", /obj/structure/ore_box, 4, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_CONTAINERS),\
 	new/datum/stack_recipe("wooden crate", /obj/structure/closet/crate/wooden, 6, time = 5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_FURNITURE),\
-	new/datum/stack_recipe("baseball bat", /obj/item/melee/baseball_bat, 5, time = 1.5 SECONDS, crafting_flags = NONE, category = CAT_WEAPON_MELEE),\
+	new/datum/stack_recipe("baseball bat", /obj/item/melee/baseball_bat, 5, time = 1.5 SECONDS, crafting_flags = NONE, category = CAT_WEAPON_MELEE, removed_mats = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 1.5)),\
 	new/datum/stack_recipe("wooden crutch", /obj/item/cane/crutch/wood, 5, time = 1.5 SECONDS, crafting_flags = NONE, category = CAT_WEAPON_MELEE),\
 	new/datum/stack_recipe("loom", /obj/structure/loom, 10, time = 1.5 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_TOOLS), \
 	new/datum/stack_recipe("mortar", /obj/item/reagent_containers/cup/mortar, 3, crafting_flags = NONE, category = CAT_CHEMISTRY), \
@@ -451,7 +451,7 @@ GLOBAL_LIST_INIT(bamboo_recipes, list ( \
 	new/datum/stack_recipe("bamboo spear", /obj/item/spear/bamboospear, 25, time = 9 SECONDS, crafting_flags = NONE, category = CAT_WEAPON_MELEE), \
 	new/datum/stack_recipe("blow gun", /obj/item/gun/syringe/blowgun, 10, time = 7 SECONDS, crafting_flags = NONE, category = CAT_WEAPON_RANGED), \
 	new/datum/stack_recipe("crude syringe", /obj/item/reagent_containers/syringe/crude, 5, time = 1 SECONDS, crafting_flags = NONE, category = CAT_CHEMISTRY), \
-	new/datum/stack_recipe("rice hat", /obj/item/clothing/head/costume/rice_hat, 10, time = 7 SECONDS, crafting_flags = NONE, category = CAT_CLOTHING), \
+	new/datum/stack_recipe("rice hat", /obj/item/clothing/head/costume/rice_hat, 10, time = 7 SECONDS, crafting_flags = CRAFT_SKIP_MATERIALS_PARITY, category = CAT_CLOTHING), \
 	null, \
 	new/datum/stack_recipe("bamboo stool", /obj/structure/chair/stool/bamboo, 2, time = 1 SECONDS, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, category = CAT_FURNITURE), \
 	new/datum/stack_recipe("bamboo mat piece", /obj/item/stack/tile/bamboo, 1, 4, 20, crafting_flags = NONE, category = CAT_TILES), \
@@ -802,11 +802,6 @@ GLOBAL_LIST_INIT(bronze_recipes, list ( \
 	. = ..()
 	. += GLOB.bronze_recipes

-/obj/item/stack/sheet/paperframes/Initialize(mapload, new_amount, merge = TRUE, list/mat_override=null, mat_amt=1)
-	. = ..()
-	pixel_x = 0
-	pixel_y = 0
-
 /obj/item/stack/sheet/bronze/thirty
 	amount = 30

@@ -881,7 +876,7 @@ GLOBAL_LIST_INIT(plastic_recipes, list(
 	new /datum/stack_recipe("plastic flaps", /obj/structure/plasticflaps, 5, crafting_flags = CRAFT_CHECK_DENSITY | CRAFT_ONE_PER_TURF | CRAFT_ON_SOLID_GROUND, time = 4 SECONDS, category = CAT_FURNITURE), \
 	new /datum/stack_recipe("water bottle", /obj/item/reagent_containers/cup/glass/waterbottle/empty, crafting_flags = NONE, category = CAT_CONTAINERS), \
 	new /datum/stack_recipe("large water bottle", /obj/item/reagent_containers/cup/glass/waterbottle/large/empty, 3, crafting_flags = NONE, category = CAT_CONTAINERS), \
-	new /datum/stack_recipe("colo cups", /obj/item/reagent_containers/cup/glass/colocup, 1, crafting_flags = NONE, category = CAT_CONTAINERS), \
+	new /datum/stack_recipe("colo cups", /obj/item/reagent_containers/cup/glass/colocup, 1, crafting_flags = NONE, category = CAT_CONTAINERS, removed_mats = list(/datum/material/plastic = HALF_SHEET_MATERIAL_AMOUNT)), \
 	new /datum/stack_recipe("mannequin", /obj/structure/mannequin/plastic, 25, time = 5 SECONDS, crafting_flags = CRAFT_ONE_PER_TURF, category = CAT_ENTERTAINMENT), \
 	new /datum/stack_recipe("wet floor sign", /obj/item/clothing/suit/caution, 2, crafting_flags = NONE, category = CAT_EQUIPMENT), \
 	new /datum/stack_recipe("warning cone", /obj/item/clothing/head/cone, 2, crafting_flags = NONE, category = CAT_EQUIPMENT), \
@@ -94,12 +94,11 @@
 	if(merge)
 		. = INITIALIZE_HINT_LATELOAD

-	var/materials_mult = amount
 	if(LAZYLEN(mat_override))
-		materials_mult *= mat_amt
 		mats_per_unit = mat_override
 	if(LAZYLEN(mats_per_unit))
-		initialize_materials(mats_per_unit, materials_mult)
+		mats_per_unit = SSmaterials.FindOrCreateMaterialCombo(mats_per_unit, mat_amt)
+		initialize_materials(mats_per_unit, amount)

 	recipes = get_main_recipes().Copy()
 	if(material_type)
@@ -120,6 +119,10 @@
 /obj/item/stack/LateInitialize()
 	merge_with_loc()

+/obj/item/stack/Destroy()
+	mats_per_unit = null
+	return ..()
+
 /obj/item/stack/Moved(atom/old_loc, movement_dir, forced, list/old_locs, momentum_change)
 	. = ..()
 	if((!throwing || throwing.target_turf == loc) && old_loc != loc && (flags_1 & INITIALIZED_1))
@@ -160,11 +163,6 @@
 		other_stack = find_other_stack(already_found, TRUE)
 	return TRUE

-/obj/item/stack/apply_material_effects(list/materials)
-	. = ..()
-	if(amount)
-		mats_per_unit = SSmaterials.FindOrCreateMaterialCombo(materials, 1/amount)
-
 /obj/item/stack/blend_requirements()
 	if(is_cyborg)
 		to_chat(usr, span_warning("[src] is too integrated into your chassis and can't be ground up!"))
@@ -417,7 +415,7 @@
 #undef FULL_LIST

 /// Makes the item with the given recipe.
-/obj/item/stack/proc/make_item(mob/builder, datum/stack_recipe/recipe, multiplier)
+/obj/item/stack/proc/make_item(mob/builder, datum/stack_recipe/recipe, multiplier = 1)
 	if(get_amount() < 1 && !is_cyborg) //sanity check as this shouldn't happen
 		qdel(src)
 		return
@@ -456,8 +454,6 @@
 			return
 		created = covered_turf.place_on_top(recipe.result_type, flags = CHANGETURF_INHERIT_AIR)
 		builder.balloon_alert(builder, "placed [ispath(recipe.result_type, /turf/open) ? "floor" : "wall"]")
-		if((recipe.crafting_flags & CRAFT_APPLIES_MATS) && LAZYLEN(mats_per_unit))
-			created.set_custom_materials(mats_per_unit, recipe.req_amount / recipe.res_amount)

 	else
 		created = new recipe.result_type(builder.drop_location())
@@ -468,17 +464,30 @@
 	if(ismovable(created))
 		created.setDir(builder.dir)
 	created.on_craft_completion(list(used_stack), null, builder)
-	qdel(used_stack) //you've outlived your purpose

 	builder.investigate_log("crafted [recipe.title]", INVESTIGATE_CRAFTING)

 	// Apply mat datums
-	if((recipe.crafting_flags & CRAFT_APPLIES_MATS) && LAZYLEN(mats_per_unit))
+	if(LAZYLEN(mats_per_unit) && !(recipe.crafting_flags & CRAFT_NO_MATERIALS))
+		var/list/result_mats = mats_per_unit.Copy()
+		for(var/mat in recipe.removed_mats)
+			var/to_remove = recipe.removed_mats[mat]
+			var/datum/material/ref_mat = locate(mat) in result_mats
+			if(!ref_mat)
+				continue
+			if(result_mats[ref_mat] < to_remove)
+				result_mats -= ref_mat
+			else
+				result_mats[ref_mat] -= to_remove
+
 		if(isstack(created))
 			var/obj/item/stack/crafted_stack = created
-			crafted_stack.set_custom_materials(mats_per_unit, (recipe.req_amount / recipe.res_amount) * crafted_stack.amount)
+			crafted_stack.mats_per_unit = SSmaterials.FindOrCreateMaterialCombo(result_mats)
+			update_custom_materials()
 		else
-			created.set_custom_materials(mats_per_unit, recipe.req_amount / recipe.res_amount)
+			created.set_custom_materials(result_mats, recipe.req_amount * multiplier)
+
+	qdel(used_stack) //you've outlived your purpose

 	// We could be qdeleted - like if it's a stack and has already been merged
 	if(QDELETED(created))
@@ -573,11 +582,10 @@
 	if (amount < used)
 		return FALSE
 	amount -= used
-	if(check && is_zero_amount(delete_if_zero = TRUE))
-		return TRUE
-	update_custom_materials()
-	update_appearance()
-	update_weight()
+	if(!is_zero_amount(delete_if_zero = check))
+		update_custom_materials()
+		update_appearance()
+		update_weight()
 	return TRUE

 /obj/item/stack/tool_use_check(mob/living/user, amount, heat_required)
@@ -25,6 +25,8 @@
 	var/trait_modifier = 1
 	/// Category for general crafting menu
 	var/category
+	/// The amount of material to remove from the recipe's result
+	var/list/removed_mats

 	///crafting_flags var to hold bool values
 	var/crafting_flags = CRAFT_CHECK_DENSITY
@@ -41,6 +43,7 @@
 	trait_booster,
 	trait_modifier = 1,
 	category,
+	list/removed_mats,
 )

 	src.title = title
@@ -55,6 +58,8 @@
 	src.trait_modifier = trait_modifier
 	src.category = src.category || category || CAT_MISC

+	src.removed_mats = removed_mats
+
 	// We create base64 image only if item have color. Otherwise use icon_ref for TGUI
 	var/obj/item/result = result_type
 	var/paint = result::color
@@ -8,6 +8,7 @@
 	attack_verb_simple = list("bash", "batter", "bludgeon", "thrash", "smash")
 	turf_type = /turf/open/floor/light
 	merge_type = /obj/item/stack/tile/light
+	mats_per_unit = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.05, /datum/material/glass = SHEET_MATERIAL_AMOUNT * 1.05)
 	var/state = 0

 /obj/item/stack/tile/light/attackby(obj/item/O, mob/user, list/modifiers, list/attack_modifiers)
@@ -230,3 +230,4 @@
 	turf_type = /turf/open/floor/fake_snow
 	mineralType = "snow"
 	merge_type = /obj/item/stack/tile/mineral/snow
+	mats_per_unit = list(/datum/material/snow = HALF_SHEET_MATERIAL_AMOUNT / 2)
@@ -137,6 +137,7 @@
 		/obj/item/stack/tile/wood/tile,
 		/obj/item/stack/tile/wood/parquet,
 	)
+	mats_per_unit = list(/datum/material/wood = HALF_SHEET_MATERIAL_AMOUNT / 2)

 /obj/item/stack/tile/wood/parquet
 	name = "parquet wood floor tile"
@@ -175,6 +176,7 @@
 		/obj/item/stack/tile/bamboo/tatami/purple,
 		/obj/item/stack/tile/bamboo/tatami/black,
 	)
+	mats_per_unit = list(/datum/material/bamboo = HALF_SHEET_MATERIAL_AMOUNT / 2)

 /obj/item/stack/tile/bamboo/tatami
 	name = "Tatami with green rim"
@@ -207,6 +209,7 @@
 	inhand_icon_state = "tile-basalt"
 	turf_type = /turf/open/floor/fakebasalt
 	merge_type = /obj/item/stack/tile/basalt
+	mats_per_unit = list(/datum/material/sand = SHEET_MATERIAL_AMOUNT * 2)

 //Carpets
 /obj/item/stack/tile/carpet
@@ -1079,6 +1082,7 @@
 		/obj/item/stack/tile/circuit/green,
 		/obj/item/stack/tile/circuit/red,
 	)
+	mats_per_unit = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.05, /datum/material/glass = SHEET_MATERIAL_AMOUNT * 1.05)

 /obj/item/stack/tile/circuit/green
 	name = "green circuit tile"
@@ -1142,7 +1146,7 @@
 	singular_name = "plastic floor tile"
 	desc = "A tile of cheap, flimsy plastic flooring."
 	icon_state = "tile_plastic"
-	mats_per_unit = list(/datum/material/plastic=SMALL_MATERIAL_AMOUNT*5)
+	mats_per_unit = list(/datum/material/plastic = HALF_SHEET_MATERIAL_AMOUNT / 2)
 	turf_type = /turf/open/floor/plastic
 	merge_type = /obj/item/stack/tile/plastic

@@ -1191,13 +1195,13 @@
 	desc = "A clangy tile made of high-quality bronze. Clockwork construction techniques allow the clanging to be minimized."
 	icon_state = "tile_brass"
 	turf_type = /turf/open/floor/bronze
-	mats_per_unit = list(/datum/material/bronze=SMALL_MATERIAL_AMOUNT*5)
+	mats_per_unit = list(/datum/material/bronze = HALF_SHEET_MATERIAL_AMOUNT / 2)
 	merge_type = /obj/item/stack/tile/bronze
 	tile_reskin_types = list(
 		/obj/item/stack/tile/bronze,
 		/obj/item/stack/tile/bronze/flat,
 		/obj/item/stack/tile/bronze/filled,
-		)
+	)

 /obj/item/stack/tile/bronze/flat
 	name = "flat bronze tile"
@@ -1257,7 +1261,7 @@
 	desc = "Flooring that shows its contents underneath. Engineers love it!"
 	icon_state = "maint_catwalk"
 	inhand_icon_state = "tile-catwalk"
-	mats_per_unit = list(/datum/material/iron=SMALL_MATERIAL_AMOUNT)
+	mats_per_unit = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 1.2)
 	turf_type = /turf/open/floor/catwalk_floor
 	merge_type = /obj/item/stack/tile/catwalk_tile //Just to be cleaner, these all stack with each other
 	tile_reskin_types = list(
@@ -1324,7 +1328,7 @@
 	inhand_icon_state = "tile-rglass"
 	turf_type = /turf/open/floor/glass/reinforced
 	merge_type = /obj/item/stack/tile/rglass
-	mats_per_unit = list(/datum/material/iron=SHEET_MATERIAL_AMOUNT * 0.125, /datum/material/glass=SHEET_MATERIAL_AMOUNT * 0.25) // 4 tiles per sheet
+	mats_per_unit = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 0.125, /datum/material/glass=SHEET_MATERIAL_AMOUNT * 0.25) // 4 tiles per sheet

 /obj/item/stack/tile/rglass/sixty
 	amount = 60
@@ -513,6 +513,7 @@
 	slot_flags = ITEM_SLOT_BACK|ITEM_SLOT_SUITSTORE|ITEM_SLOT_NECK
 	resistance_flags = FLAMMABLE
 	storage_type = /datum/storage/bag/rebar_quiver
+	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 6.5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.5)

 /obj/item/storage/bag/rebar_quiver/syndicate
 	icon_state = "syndie_quiver_0"
@@ -582,6 +583,7 @@

 /obj/item/storage/bag/quiver/lesser
 	storage_type = /datum/storage/bag/quiver/less
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT)

 /obj/item/storage/bag/quiver/full/PopulateContents()
 	. = ..()
@@ -19,6 +19,8 @@

 /obj/item/storage/box/Initialize(mapload)
 	. = ..()
+	if(foldable_result == /obj/item/stack/sheet/cardboard)
+		set_custom_materials(list(/datum/material/cardboard = SHEET_MATERIAL_AMOUNT))
 	update_appearance()

 /obj/item/storage/box/suicide_act(mob/living/carbon/user)
@@ -58,6 +58,7 @@
 	illustration = null
 	resistance_flags = FLAMMABLE
 	foldable_result = null
+	custom_materials = list(/datum/material/paper = SHEET_MATERIAL_AMOUNT * 1.25)
 	/// A list of all available papersack reskins
 	var/list/papersack_designs = list()
 	///What design from papersack_designs we are currently using.
@@ -609,7 +609,7 @@
 	spawn_count = 10
 	contents_tag = "pickle"
 	foldable_result = /obj/item/reagent_containers/cup/beaker/large
-	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/glass = SHEET_MATERIAL_AMOUNT * 1.25)
 	open_status = FANCY_CONTAINER_ALWAYS_OPEN
 	has_open_closed_states = FALSE
 	storage_type = /datum/storage/pickles_jar
@@ -498,6 +498,7 @@
 	righthand_file = 'icons/mob/inhands/equipment/medical_righthand.dmi'
 	w_class = WEIGHT_CLASS_SMALL
 	storage_type = /datum/storage/test_tube_rack
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT)

 /obj/item/storage/test_tube_rack/update_icon_state()
 	icon_state = "[base_icon_state][contents.len > 0 ? contents.len : null]"
@@ -13,6 +13,7 @@
 	slowdown = 1
 	item_flags = SLOWS_WHILE_IN_HAND
 	pass_flags = NONE
+	custom_materials = list(/datum/material/silver = SHEET_MATERIAL_AMOUNT, /datum/material/iron = SHEET_MATERIAL_AMOUNT)

 	/// If true we're currently portable
 	var/is_portable = TRUE
@@ -189,6 +189,7 @@
 	full_speed = FALSE
 	drift_force = 1 NEWTONS
 	stabilizer_force = 0.5 NEWTONS
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 4.4, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 3)

 /obj/item/tank/jetpack/improvised/allow_thrust(num)
 	if(!ismob(loc))
@@ -300,6 +300,12 @@
 		ACCESS_RD,
 		ACCESS_SYNDICATE,
 	)
+	custom_materials = list(
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 4.75,
+		/datum/material/silver = SHEET_MATERIAL_AMOUNT * 2.50,
+		/datum/material/titanium = SHEET_MATERIAL_AMOUNT * 1.75,
+		/datum/material/glass = SHEET_MATERIAL_AMOUNT * 1.25,
+	)
 	radio_alert = TRUE

 /obj/item/crowbar/power/paramedic/sound_the_alarms(mob/user, obj/machinery/door/airlock/target)
@@ -586,6 +586,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	attack_verb_continuous = list("attacks", "strikes", "hits")
 	attack_verb_simple = list("attack", "strike", "hit")
+	custom_materials = list(/datum/material/plastic = SHEET_MATERIAL_AMOUNT * 4, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.1, /datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.1)
 	/// Whether our sword has been multitooled to rainbow
 	var/hacked = FALSE
 	/// The color of our fake energy sword
@@ -1081,6 +1082,7 @@
 	icon_state = "snowball"
 	throwforce = 20 //the same damage as a disabler shot
 	damtype = STAMINA //maybe someday we can add stuffing rocks (or perhaps ore?) into snowballs to make them deal brute damage
+	custom_materials = list(/datum/material/snow = SHEET_MATERIAL_AMOUNT)

 /obj/item/toy/snowball/ranged_interact_with_atom(atom/interacting_with, mob/living/user, list/modifiers)
 	user.throw_item(interacting_with)
@@ -66,6 +66,7 @@
 	throw_speed = 1
 	armour_penetration = 15
 	hitsound = 'sound/items/car_engine_start.ogg'
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 14, /datum/material/cardboard = SHEET_MATERIAL_AMOUNT, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.8)
 	/// The number of charges the house edge has accrued through 2-handed hits, to charge a more powerful charge attack.
 	var/fire_charges = 0
 	///Sound played when wielded.
@@ -628,6 +628,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	icon_angle = -135
 	lefthand_file = 'icons/mob/inhands/weapons/staves_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/weapons/staves_righthand.dmi'
+	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 4)

 /obj/item/bambostaff/Initialize(mapload)
 	. = ..()
@@ -745,7 +746,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	desc = "A handmade crutch. Also makes a decent bludgeon if you need it."
 	icon_state = "crutch_wood"
 	inhand_icon_state = "crutch_wood"
-	custom_materials = list(/datum/material/wood = SMALL_MATERIAL_AMOUNT * 0.5)
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 5)

 /obj/item/cane/white
 	name = "white cane"
@@ -873,6 +874,7 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 	throw_range = 1
 	attack_verb_continuous = list("clubs", "bludgeons")
 	attack_verb_simple = list("club", "bludgeon")
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)

 /obj/item/melee/baseball_bat
 	name = "baseball bat"
@@ -22,6 +22,7 @@
 	force = 10
 	throwforce = 6
 	w_class = WEIGHT_CLASS_BULKY
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 22, /datum/material/plastic = SHEET_MATERIAL_AMOUNT * 5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 0.5)
 	///What item is being charged currently?
 	var/obj/item/charging = null
 	///Did we put power into "charging" last process()?
@@ -19,6 +19,7 @@
 	resistance_flags = FLAMMABLE
 	max_integrity = 100
 	integrity_failure = 0.35
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)
 	/// What material this bed is made of
 	var/build_stack_type = /obj/item/stack/sheet/iron
 	/// How many mats to drop when deconstructed
@@ -314,6 +315,7 @@
 	build_stack_type = /obj/item/stack/sheet/mineral/wood
 	build_stack_amount = 10
 	elevation = 0
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 10)
 	var/owned = FALSE

 /obj/structure/bed/dogbed/ian
@@ -381,6 +383,7 @@
 	icon_state = "bed_double"
 	build_stack_amount = 4
 	max_buckled_mobs = 2
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 4)
 	/// The mob who buckled to this bed second, to avoid other mobs getting pixel-shifted before he unbuckles.
 	var/mob/living/goldilocks

@@ -188,6 +188,7 @@
 	buildstackamount = 3
 	item_chair = /obj/item/chair/wood
 	fishing_modifier = -6
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 3)

 /obj/structure/chair/wood/narsie_act()
 	return
@@ -207,6 +208,7 @@
 	item_chair = null
 	fishing_modifier = -7
 	has_armrest = TRUE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 2)

 /obj/structure/chair/comfy/brown
 	color = rgb(70, 47, 28)
@@ -232,7 +234,7 @@
 	unbuckle_sound = SFX_SEATBELT_UNBUCKLE
 	resistance_flags = FIRE_PROOF
 	max_integrity = 120
-	custom_materials = list(/datum/material/titanium = SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/titanium = SHEET_MATERIAL_AMOUNT * 2)

 /obj/structure/chair/comfy/shuttle/electrify_self(obj/item/assembly/shock_kit/input_shock_kit, mob/user, list/overlays_from_child_procs)
 	if(!overlays_from_child_procs)
@@ -286,6 +288,7 @@
 	icon_state = "carp_chair"
 	buildstacktype = /obj/item/stack/sheet/animalhide/carp
 	fishing_modifier = -12
+	custom_materials = null

 /obj/structure/chair/office
 	name = "office chair"
@@ -294,6 +297,7 @@
 	item_chair = null
 	fishing_modifier = -6
 	icon_state = "officechair_dark"
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 5)

 /obj/structure/chair/office/Initialize(mapload)
 	. = ..()
@@ -375,6 +379,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	buildstacktype = /obj/item/stack/sheet/mineral/bamboo
 	buildstackamount = 2
 	item_chair = /obj/item/chair/stool/bamboo
+	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 2)

 /obj/item/chair
 	name = "chair"
@@ -393,7 +398,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	max_integrity = 100
 	hitsound = 'sound/items/trayhit/trayhit1.ogg'
 	hit_reaction_chance = 50
-	custom_materials = list(/datum/material/iron =SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	item_flags = SKIP_FANTASY_ON_SPAWN

 	// Duration of daze inflicted when the chair is smashed against someone from behind.
@@ -524,6 +529,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	origin_type = /obj/structure/chair/stool/bamboo
 	max_integrity = 40 //Submissive and breakable unlike the chad iron stool
 	daze_amount = 0 //Not hard enough to cause them to become dazed
+	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 2)

 /obj/item/chair/stool/narsie_act()
 	return //sturdy enough to ignore a god
@@ -538,6 +544,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	origin_type = /obj/structure/chair/wood
 	custom_materials = null
 	daze_amount = 0
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 3)

 /obj/item/chair/wood/narsie_act()
 	return
@@ -563,6 +570,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	item_chair = null
 	fishing_modifier = -13 //the pinnacle of Ratvarian technology.
 	has_armrest = TRUE
+	custom_materials = list(/datum/material/bronze = SHEET_MATERIAL_AMOUNT)
 	/// Total rotations made
 	var/turns = 0

@@ -606,6 +614,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	obj_flags = parent_type::obj_flags | NO_DEBRIS_AFTER_DECONSTRUCTION
 	alpha = 0
 	fishing_modifier = -21 //it only lives for 25 seconds, so we make them worth it.
+	custom_materials = null

 /obj/structure/chair/mime/wrench_act_secondary(mob/living/user, obj/item/weapon)
 	return NONE
@@ -622,7 +631,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	desc = "No matter how much you squirm, it'll still be uncomfortable."
 	resistance_flags = FLAMMABLE
 	max_integrity = 70
-	custom_materials = list(/datum/material/plastic =SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plastic = SHEET_MATERIAL_AMOUNT * 2)
 	buildstacktype = /obj/item/stack/sheet/plastic
 	buildstackamount = 2
 	item_chair = /obj/item/chair/plastic
@@ -656,7 +665,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/chair/stool/bar, 0)
 	w_class = WEIGHT_CLASS_NORMAL
 	force = 7
 	throw_range = 5 //Lighter Weight --> Flies Farther.
-	custom_materials = list(/datum/material/plastic =SHEET_MATERIAL_AMOUNT)
+	custom_materials = list(/datum/material/plastic = SHEET_MATERIAL_AMOUNT * 2)
 	max_integrity = 70
 	daze_amount = 0
 	origin_type = /obj/structure/chair/plastic
@@ -8,6 +8,7 @@
 	buildstacktype = /obj/item/stack/sheet/mineral/wood
 	buildstackamount = 3
 	item_chair = null
+	custom_materials = list(/datum/material/wood = SHEET_MATERIAL_AMOUNT * 3)

 ///This proc adds the rotate component, overwrite this if you for some reason want to change some specific args.
 /obj/structure/chair/pew/MakeRotate()
@@ -111,6 +111,7 @@ COLORED_SOFA(/obj/structure/chair/sofa, maroon, SOFA_MAROON)
 	buildstacktype = /obj/item/stack/sheet/mineral/bamboo
 	buildstackamount = 3
 	has_armrest = FALSE
+	custom_materials = list(/datum/material/bamboo = SHEET_MATERIAL_AMOUNT * 3)

 /obj/structure/chair/sofa/bamboo/left
 	icon_state = "bamboo_sofaend_left"
@@ -581,6 +581,7 @@ LINEN BINS
 	resistance_flags = FLAMMABLE
 	max_integrity = 70
 	anchored_tabletop_offset = 6
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT)
 	/// The number of bedsheets in the bin
 	var/amount = 10
 	/// A list of actual sheets within the bin
--- a/Show More
+++ b/Show More