Merge branch 'master' of https://github.com/Citadel-Station-13/Citadel-Station-13 into dojo-ghostrole

code/game/objects/effects/effect_system/effects_foam.dm

@@ -123,7 +123,7 @@
 	if(metal)
 		var/turf/T = get_turf(src)
 		if(isspaceturf(T)) //Block up any exposed space
-			T.PlaceOnTop(/turf/open/floor/plating/foam)
+			T.PlaceOnTop(/turf/open/floor/plating/foam, flags = CHANGETURF_INHERIT_AIR)
 		for(var/direction in GLOB.cardinals)
 			var/turf/cardinal_turf = get_step(T, direction)
 			if(get_area(cardinal_turf) != get_area(T)) //We're at an area boundary, so let's block off this turf!

code/game/objects/items.dm

@@ -578,21 +578,22 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 			itempush = 0 //too light to push anything
 		return A.hitby(src, 0, itempush)
 
-/obj/item/throw_at(atom/target, range, speed, mob/thrower, spin=1, diagonals_first = 0, datum/callback/callback)
+/obj/item/throw_at(atom/target, range, speed, mob/thrower, spin=1, diagonals_first = 0, datum/callback/callback, messy_throw = TRUE)
 	thrownby = thrower
-	callback = CALLBACK(src, .proc/after_throw, callback) //replace their callback with our own
+	callback = CALLBACK(src, .proc/after_throw, callback, (spin && messy_throw)) //replace their callback with our own
 	. = ..(target, range, speed, thrower, spin, diagonals_first, callback)
 
-/obj/item/proc/after_throw(datum/callback/callback)
+/obj/item/proc/after_throw(datum/callback/callback, messy_throw)
 	if (callback) //call the original callback
 		. = callback.Invoke()
 	throw_speed = initial(throw_speed) //explosions change this.
 	item_flags &= ~IN_INVENTORY
-	var/matrix/M = matrix(transform)
-	M.Turn(rand(-170, 170))
-	transform = M
-	pixel_x = rand(-8, 8)
-	pixel_y = rand(-8, 8)
+	if(messy_throw)
+		var/matrix/M = matrix(transform)
+		M.Turn(rand(-170, 170))
+		transform = M
+		pixel_x = rand(-8, 8)
+		pixel_y = rand(-8, 8)
 
 /obj/item/proc/remove_item_from_storage(atom/newLoc) //please use this if you're going to snowflake an item out of a obj/item/storage
 	if(!newLoc)

code/game/objects/items/cigs_lighters.dm

@@ -863,3 +863,205 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 
 	if(reagents && reagents.total_volume)
 		hand_reagents()
+
+///////////////
+/////BONGS/////
+///////////////
+
+/obj/item/bong
+	name = "bong"
+	desc = "A water bong used for smoking dried plants."
+	icon = 'icons/obj/bongs.dmi'
+	icon_state = null
+	item_state = null
+	w_class = WEIGHT_CLASS_NORMAL
+	light_color = "#FFCC66"
+	var/icon_off = "bong"
+	var/icon_on = "bong_lit"
+	var/chem_volume = 100
+	var/last_used_time //for cooldown
+	var/firecharges = 0 //used for counting how many hits can be taken before the flame goes out
+	var/list/list_reagents = list() //For the base reagents bongs could get
+
+
+/obj/item/bong/Initialize()
+	. = ..()
+	create_reagents(chem_volume, NO_REACT) // so it doesn't react until you light it
+	reagents.add_reagent_list(list_reagents)
+	icon_state = icon_off
+
+/obj/item/bong/attackby(obj/item/O, mob/user, params)
+	. = ..()
+	//If we're using a dried plant..
+	if(istype(O,/obj/item/reagent_containers/food/snacks))
+		var/obj/item/reagent_containers/food/snacks/DP = O
+		if (DP.dry)
+			//Nothing if our bong is full
+			if (reagents.holder_full())
+				user.show_message("<span class='notice'>The bowl is full!</span>", MSG_VISUAL)
+				return
+
+			//Transfer reagents and remove the plant
+			user.show_message("<span class='notice'>You stuff the [DP] into the [src]'s bowl.</span>", MSG_VISUAL)
+			DP.reagents.trans_to(src, 100)
+			qdel(DP)
+			return
+		else
+			user.show_message("<span class='warning'>[DP] must be dried first!</span>", MSG_VISUAL)
+			return
+
+	if (O.get_temperature() <= 500)
+		return
+	if (reagents && reagents.total_volume) //if there's stuff in the bong
+		var/lighting_text = O.ignition_effect(src, user)
+		if(lighting_text)
+			//Logic regarding igniting it on
+			if (firecharges == 0)
+				user.show_message("<span class='notice'>You light the [src] with the [O]!</span>", MSG_VISUAL)
+				bongturnon()
+			else
+				user.show_message("<span class='notice'>You rekindle [src]'s flame with the [O]!</span>", MSG_VISUAL)
+
+			firecharges = 1
+			return
+	else
+		user.show_message("<span warning='notice'>There's nothing to light up in the bowl.</span>", MSG_VISUAL)
+		return
+
+/obj/item/bong/CtrlShiftClick(mob/user) //empty reagents on alt click
+	..()
+	if(!istype(user) || !user.canUseTopic(src, BE_CLOSE, ismonkey(user)))
+		return
+
+	if (reagents && reagents.total_volume)
+		user.show_message("<span class='notice'>You empty the [src].</span>", MSG_VISUAL)
+		reagents.clear_reagents()
+		if(firecharges)
+			firecharges = 0
+			bongturnoff()
+	else
+		user.show_message("<span class='notice'>The [src] is already empty.</span>", MSG_VISUAL)
+
+/obj/item/bong/AltClick(mob/user)
+	..()
+	if(!istype(user) || !user.canUseTopic(src, BE_CLOSE, ismonkey(user)))
+		return
+
+	if(firecharges)
+		firecharges = 0
+		bongturnoff()
+		user.show_message("<span class='notice'>You quench the flame.</span>", MSG_VISUAL)
+		return TRUE
+
+/obj/item/bong/examine(mob/user)
+	. = ..()
+	if(!reagents.total_volume)
+		. += "<span class='notice'>The bowl is empty.</span>"
+	else if (reagents.total_volume > 80)
+		. += "<span class='notice'>The bowl is filled to the brim.</span>"
+	else if (reagents.total_volume > 40)
+		. += "<span class='notice'>The bowl has plenty weed in it.</span>"
+	else
+		. += "<span class='notice'>The bowl has some weed in it.</span>"
+
+	. += "<span class='notice'>Ctrl+Shift-click to empty.</span>"
+	. += "<span class='notice'>Alt-click to extinguish.</span>"
+
+/obj/item/bong/ignition_effect(atom/A, mob/user)
+	if(firecharges)
+		. = "<span class='notice'>[user] lights [A] off of the [src].</span>"
+	else
+		. = ""
+
+/obj/item/bong/attack(mob/living/carbon/M, mob/living/carbon/user, obj/target)
+	//if it's lit up, some stuff in the bowl and the user is a target, and we're not on cooldown
+
+	if (M != user)
+		return ..()
+
+	if(user.is_mouth_covered(head_only = 1))
+		to_chat(user, "<span class='warning'>Remove your headgear first.</span>")
+		return ..()
+
+	if(user.is_mouth_covered(mask_only = 1))
+		to_chat(user, "<span class='warning'>Remove your mask first.</span>")
+		return ..()
+
+	if (!reagents.total_volume)
+		to_chat(user, "<span class='warning'>There's nothing in the bowl.</span>")
+		return ..()
+
+	if (!firecharges)
+		to_chat(user, "<span class='warning'>You have to light it up first.</span>")
+		return ..()
+
+	if (last_used_time + 30 >= world.time)
+		return ..()
+	var/hit_strength
+	var/noise
+	var/hittext = ""
+	//if the intent is help then you take a small hit, else a big one
+	if (user.a_intent == INTENT_HARM)
+		hit_strength = 2
+		noise = 100
+		hittext = "big hit"
+	else
+		hit_strength = 1
+		noise = 70
+		hittext = "hit"
+	//bubbling sound
+	playsound(user.loc,'sound/effects/bonghit.ogg', noise, 1)
+
+	last_used_time = world.time
+
+	//message
+	user.visible_message("<span class='notice'>[user] begins to take a [hittext] from the [src]!</span>", \
+								"<span class='notice'>You begin to take a [hittext] from [src].</span>")
+
+	//we take a hit here, after an uninterrupted delay
+	if(!do_after(user, 25, target = user))
+		return
+	if (!(reagents && reagents.total_volume))
+		return
+
+	var/fraction = 12 * hit_strength
+
+	var/datum/effect_system/smoke_spread/chem/smoke_machine/s = new
+	s.set_up(reagents, hit_strength, 18, user.loc)
+	s.start()
+
+	reagents.reaction(user, INGEST, fraction)
+	if(!reagents.trans_to(user, fraction))
+		reagents.remove_any(fraction)
+
+	if (hit_strength == 2 && prob(15))
+		user.emote("cough")
+		user.adjustOxyLoss(15)
+
+	user.visible_message("<span class='notice'>[user] takes a [hittext] from the [src]!</span>", \
+							"<span class='notice'>You take a [hittext] from [src].</span>")
+
+	firecharges = firecharges - 1
+	if (!firecharges)
+		bongturnoff()
+	if (!reagents.total_volume)
+		firecharges = 0
+		bongturnoff()
+
+
+
+/obj/item/bong/proc/bongturnon()
+	icon_state = icon_on
+	set_light(3, 0.8)
+
+/obj/item/bong/proc/bongturnoff()
+	icon_state = icon_off
+	set_light(0, 0.0)
+
+
+
+/obj/item/bong/coconut
+	name = "coconut bong"
+	icon_off = "coconut_bong"
+	icon_on = "coconut_bong_lit"
+	desc = "A water bong used for smoking dried plants. This one's made out of a coconut and some bamboo."

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

@@ -2,7 +2,7 @@
 	name = "forcefield projector"
 	desc = "An experimental device that can create several forcefields at a distance."
 	icon = 'icons/obj/device.dmi'
-	icon_state = "signmaker_engi"
+	icon_state = "signmaker_forcefield"
 	slot_flags = ITEM_SLOT_BELT
 	w_class = WEIGHT_CLASS_SMALL
 	item_flags = NOBLUDGEON

code/game/objects/items/holosign_creator.dm

@@ -79,7 +79,7 @@
 /obj/item/holosign_creator/atmos
 	name = "ATMOS holofan projector"
 	desc = "A holographic projector that creates holographic barriers that prevent changes in atmosphere conditions."
-	icon_state = "signmaker_engi"
+	icon_state = "signmaker_atmos"
 	holosign_type = /obj/structure/holosign/barrier/atmos
 	creation_time = 0
 	max_signs = 3

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

@@ -374,7 +374,7 @@
 			It appears to have a wooden grip and a shaved down guard."
 	icon_state = "cxsword_hilt_traitor"
 	force_on = 30
-	armour_penetration = 50
+	armour_penetration = 35
 	embedding = list("embedded_pain_multiplier" = 10, "embed_chance" = 75, "embedded_fall_chance" = 0, "embedded_impact_pain_multiplier" = 10)
 	block_chance = 50
 	hitsound_on = 'sound/weapons/blade1.ogg'

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

@@ -216,10 +216,11 @@
 			return
 	else
 		if(last_hit < world.time)
+			if(target.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK))
+				playsound(target, 'sound/weapons/genhit.ogg', 50, 1)
+				return
 			if(ishuman(target))
 				var/mob/living/carbon/human/H = target
-				if (H.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK))
-					return
 				if(check_martial_counter(H, user))
 					return
 			playsound(get_turf(src), 'sound/effects/woodhit.ogg', 75, 1, -1)

code/game/objects/items/robot/robot_items.dm

@@ -11,11 +11,9 @@
 	var/charge_cost = 30
 
 /obj/item/borg/stun/attack(mob/living/M, mob/living/user)
-	if(ishuman(M))
-		var/mob/living/carbon/human/H = M
-		if(H.check_shields(src, 0, "[M]'s [name]", MELEE_ATTACK))
-			playsound(M, 'sound/weapons/genhit.ogg', 50, 1)
-			return FALSE
+	if(M.check_shields(src, 0, "[M]'s [name]", MELEE_ATTACK))
+		playsound(M, 'sound/weapons/genhit.ogg', 50, 1)
+		return FALSE
 	if(iscyborg(user))
 		var/mob/living/silicon/robot/R = user
 		if(!R.cell.use(charge_cost))

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

@@ -192,9 +192,14 @@
 		var/obj/O
 		if(R.max_res_amount > 1) //Is it a stack?
 			O = new R.result_type(usr.drop_location(), R.res_amount * multiplier)
-		else
+		else if(ispath(R.result_type, /turf))
+			var/turf/T = usr.drop_location()
+			if(!isturf(T))
+				return
+			T.PlaceOnTop(R.result_type, flags = CHANGETURF_INHERIT_AIR)
 			O = new R.result_type(usr.drop_location())
-		O.setDir(usr.dir)
+		if(O)
+			O.setDir(usr.dir)
 		use(R.req_amount * multiplier)
 
 		//START: oh fuck i'm so sorry

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

@@ -61,6 +61,7 @@
 		/obj/item/radio,
 		/obj/item/clothing/gloves,
 		/obj/item/holosign_creator,
+		/obj/item/forcefield_projector,
 		/obj/item/assembly/signaler
 		))
 	STR.can_hold = can_hold
@@ -458,8 +459,7 @@
 		/obj/item/extinguisher/mini,
 		/obj/item/radio,
 		/obj/item/clothing/gloves,
-		/obj/item/holosign_creator/atmos,
-		/obj/item/holosign_creator/engineering,
+		/obj/item/holosign_creator,
 		/obj/item/forcefield_projector,
 		/obj/item/assembly/signaler,
 		/obj/item/lightreplacer,
@@ -571,6 +571,7 @@
 		/obj/item/reagent_containers/spray,
 		/obj/item/soap,
 		/obj/item/holosign_creator,
+		/obj/item/forcefield_projector,
 		/obj/item/key/janitor,
 		/obj/item/clothing/gloves,
 		/obj/item/melee/flyswatter,
@@ -582,7 +583,7 @@
 
 /obj/item/storage/belt/bandolier
 	name = "bandolier"
-	desc = "A bandolier for holding shotgun ammunition."
+	desc = "A bandolier for holding ammunition."
 	icon_state = "bandolier"
 	item_state = "bandolier"
 
@@ -592,7 +593,7 @@
 	STR.max_items = 18
 	STR.display_numerical_stacking = TRUE
 	STR.can_hold = typecacheof(list(
-		/obj/item/ammo_casing/shotgun
+		/obj/item/ammo_casing
 		))
 
 /obj/item/storage/belt/bandolier/durathread

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

@@ -1259,3 +1259,12 @@
 	var/obj/item/stack/sheet/cardboard/I = new(user.drop_location())
 	qdel(src)
 	user.put_in_hands(I)
+
+/obj/item/storage/box/marshmallow
+	name = "box of marshmallows"
+	desc = "A box of marshmallows."
+	illustration = "marshmallow"
+
+/obj/item/storage/box/marshmallow/PopulateContents()
+	for (var/i in 1 to 5)
+		new /obj/item/reagent_containers/food/snacks/marshmallow(src)

code/game/objects/items/stunbaton.dm

@@ -36,7 +36,7 @@
 	. = ..()
 	if(preload_cell_type)
 		if(!ispath(preload_cell_type,/obj/item/stock_parts/cell))
-			log_world("### MAP WARNING, [src] at [AREACOORD(src)] had an invalid preload_cell_type: [preload_cell_type].")
+			log_mapping("[src] at [AREACOORD(src)] had an invalid preload_cell_type: [preload_cell_type].")
 		else
 			cell = new preload_cell_type(src)
 	update_icon()
@@ -168,11 +168,9 @@
 
 
 /obj/item/melee/baton/proc/baton_stun(mob/living/L, mob/user)
-	if(ishuman(L))
-		var/mob/living/carbon/human/H = L
-		if(H.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK)) //No message; check_shields() handles that
-			playsound(L, 'sound/weapons/genhit.ogg', 50, 1)
-			return FALSE
+	if(L.check_shields(src, 0, "[user]'s [name]", MELEE_ATTACK)) //No message; check_shields() handles that
+		playsound(L, 'sound/weapons/genhit.ogg', 50, 1)
+		return FALSE
 	var/stunpwr = stunforce
 	var/obj/item/stock_parts/cell/our_cell = get_cell()
 	if(!our_cell)

code/game/objects/items/telescopic_iv.dm

@@ -9,7 +9,7 @@
 
 /obj/item/tele_iv/afterattack(atom/target, mob/user, proximity)
 	. = ..()
-	if(proximity|| isopenturf(target))
+	if(proximity && isopenturf(target) && user.CanReach(target))
 		deploy_iv(user, target)
 
 /obj/item/tele_iv/proc/deploy_iv(mob/user, atom/location)

code/game/objects/items/twohanded.dm

@@ -872,7 +872,7 @@
 		user.visible_message("<span class='danger'>[user] blasts \the [target] with \the [src]!</span>")
 		playsound(target, 'sound/magic/disintegrate.ogg', 100, 1)
 		W.break_wall()
-		W.ScrapeAway()
+		W.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		return
 
 //HF blade

code/game/objects/objs.dm

@@ -80,13 +80,12 @@
 	SEND_SIGNAL(src, COMSIG_OBJ_SETANCHORED, anchorvalue)
 	anchored = anchorvalue
 
-/obj/throw_at(atom/target, range, speed, mob/thrower, spin=1, diagonals_first = 0, datum/callback/callback)
-	..()
+/obj/throw_at(atom/target, range, speed, mob/thrower, spin=1, diagonals_first = 0, datum/callback/callback, messy_throw)
+	. = ..()
 	if(obj_flags & FROZEN)
 		visible_message("<span class='danger'>[src] shatters into a million pieces!</span>")
 		qdel(src)
 
-
 /obj/assume_air(datum/gas_mixture/giver)
 	if(loc)
 		return loc.assume_air(giver)

code/game/objects/structures/crates_lockers/closets/secure/engineering.dm

@@ -12,18 +12,12 @@
 	new /obj/item/clothing/head/hardhat/white(src)
 	new /obj/item/clothing/head/hardhat/weldhat/white(src)
 	new /obj/item/clothing/gloves/color/yellow(src)
-	new /obj/item/clothing/shoes/sneakers/brown(src)
 	new /obj/item/tank/jetpack/suit(src)
 	new /obj/item/cartridge/ce(src)
 	new /obj/item/radio/headset/heads/ce(src)
-	new /obj/item/storage/toolbox/mechanical(src)
-	new /obj/item/clothing/suit/hazardvest(src)
 	new /obj/item/megaphone/command(src)
 	new /obj/item/areaeditor/blueprints(src)
-	new /obj/item/airlock_painter(src)
 	new /obj/item/holosign_creator/engineering(src)
-	new /obj/item/clothing/mask/gas(src)
-	new /obj/item/multitool(src)
 	new /obj/item/assembly/flash/handheld(src)
 	new /obj/item/clothing/glasses/meson/engine(src)
 	new /obj/item/door_remote/chief_engineer(src)
@@ -67,7 +61,7 @@
 	for(var/i in 1 to 3)
 		new /obj/item/clothing/head/welding(src)
 	for(var/i in 1 to 3)
-		new /obj/item/weldingtool(src)
+		new /obj/item/weldingtool/largetank(src)
 
 /obj/structure/closet/secure_closet/engineering_personal
 	name = "engineer's locker"
@@ -84,7 +78,6 @@
 	new /obj/item/clothing/glasses/meson/engine(src)
 	new /obj/item/storage/box/emptysandbags(src)
 
-
 /obj/structure/closet/secure_closet/atmospherics
 	name = "\proper atmospheric technician's locker"
 	req_access = list(ACCESS_ATMOSPHERICS)
@@ -103,3 +96,33 @@
 	new /obj/item/clothing/head/hardhat/atmos(src)
 	new /obj/item/clothing/glasses/meson/engine/tray(src)
 	new /obj/item/extinguisher/advanced(src)
+
+/*
+ * Empty lockers
+ * Some of the lockers are filled with junk, and sometimes its nice to just fill it with your own set-up for your own map gimmicks.
+ */
+
+/obj/structure/closet/secure_closet/engineering_chief/empty
+
+/obj/structure/closet/secure_closet/engineering_chief/empty/PopulateContents()
+	return
+
+/obj/structure/closet/secure_closet/engineering_electrical/empty
+
+/obj/structure/closet/secure_closet/engineering_electrical/empty/PopulateContents()
+	return
+
+/obj/structure/closet/secure_closet/engineering_welding/empty
+
+/obj/structure/closet/secure_closet/engineering_welding/empty/PopulateContents()
+	return
+
+/obj/structure/closet/secure_closet/engineering_personal/empty
+
+/obj/structure/closet/secure_closet/engineering_personal/empty/PopulateContents()
+	return
+
+/obj/structure/closet/secure_closet/atmospherics/empty
+
+/obj/structure/closet/secure_closet/atmospherics/empty/PopulateContents()
+	return

code/game/objects/structures/dresser.dm

@@ -30,11 +30,11 @@
 		return
 
 	var/list/undergarment_choices = list("Underwear", "Underwear Color", "Undershirt", "Undershirt Color", "Socks", "Socks Color")
-	if(!UNDIE_COLORABLE(GLOB.underwear_list[H.underwear]))
+	if(!(GLOB.underwear_list[H.underwear]?.has_color))
 		undergarment_choices -= "Underwear Color"
-	if(!UNDIE_COLORABLE(GLOB.undershirt_list[H.undershirt]))
+	if(!(GLOB.undershirt_list[H.undershirt]?.has_color))
 		undergarment_choices -= "Undershirt Color"
-	if(!UNDIE_COLORABLE(GLOB.socks_list[H.socks]))
+	if(!(GLOB.socks_list[H.socks]?.has_color))
 		undergarment_choices -= "Socks Color"
 
 	var/choice = input(H, "Underwear, Undershirt, or Socks?", "Changing") as null|anything in undergarment_choices

code/game/objects/structures/ghost_role_spawners.dm

@@ -605,7 +605,7 @@
 	rank = "Gunner"
 
 /obj/effect/mob_spawn/human/ghostcafe
-	name = "ghost cafe sleeper"
+	name = "Ghost Cafe Sleeper"
 	uses = -1
 	icon = 'icons/obj/machines/sleeper.dmi'
 	icon_state = "sleeper"
@@ -639,6 +639,7 @@
 	uniform = /obj/item/clothing/under/color/random
 	shoes = /obj/item/clothing/shoes/sneakers/black
 	id = /obj/item/card/id
+	r_hand = /obj/item/storage/box/syndie_kit/chameleon/ghostcafe
 
 
 /datum/outfit/ghostcafe/pre_equip(mob/living/carbon/human/H, visualsOnly = FALSE, client/preference_source)
@@ -655,3 +656,17 @@
 		else
 			uniform = /obj/item/clothing/under/skirt/color/random
 
+/obj/item/storage/box/syndie_kit/chameleon/ghostcafe
+	name = "ghost cafe costuming kit"
+	desc = "Look just the way you did in life - or better!"
+
+/obj/item/storage/box/syndie_kit/chameleon/ghostcafe/PopulateContents() // Doesn't contain a PDA, for isolation reasons.
+	new /obj/item/clothing/under/chameleon(src)
+	new /obj/item/clothing/suit/chameleon(src)
+	new /obj/item/clothing/gloves/chameleon(src)
+	new /obj/item/clothing/shoes/chameleon(src)
+	new /obj/item/clothing/glasses/chameleon(src)
+	new /obj/item/clothing/head/chameleon(src)
+	new /obj/item/clothing/mask/chameleon(src)
+	new /obj/item/storage/backpack/chameleon(src)
+	new /obj/item/clothing/neck/cloak/chameleon(src)

code/game/objects/structures/lattice.dm

@@ -60,7 +60,7 @@
 		to_chat(user, "<span class='notice'>You build a floor.</span>")
 		var/turf/T = src.loc
 		if(isspaceturf(T))
-			T.PlaceOnTop(/turf/open/floor/plating)
+			T.PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			qdel(src)
 			return TRUE
 	return FALSE

code/game/objects/structures/stairs.dm

@@ -102,13 +102,13 @@
 /obj/structure/stairs/proc/force_open_above()
 	var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 	if(T && !istype(T))
-		T.ChangeTurf(/turf/open/openspace)
+		T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/proc/on_multiz_new(turf/source, dir)
 	if(dir == UP)
 		var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 		if(T && !istype(T))
-			T.ChangeTurf(/turf/open/openspace)
+			T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/intercept_zImpact(atom/movable/AM, levels = 1)
 	. = ..()