add flag CHANGETURF_INHERIT_AIR

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

@@ -281,14 +281,14 @@
 				occupant_message("Deconstructing [W]...")
 				if(do_after_cooldown(W))
 					chassis.spark_system.start()
-					W.ScrapeAway()
+					W.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 					playsound(W, 'sound/items/deconstruct.ogg', 50, 1)
 			else if(isfloorturf(target))
 				var/turf/open/floor/F = target
 				occupant_message("Deconstructing [F]...")
 				if(do_after_cooldown(target))
 					chassis.spark_system.start()
-					F.ScrapeAway()
+					F.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 					playsound(F, 'sound/items/deconstruct.ogg', 50, 1)
 			else if (istype(target, /obj/machinery/door/airlock))
 				occupant_message("Deconstructing [target]...")
@@ -301,7 +301,7 @@
 				var/turf/open/space/S = target
 				occupant_message("Building Floor...")
 				if(do_after_cooldown(S))
-					S.PlaceOnTop(/turf/open/floor/plating)
+					S.PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 					playsound(S, 'sound/items/deconstruct.ogg', 50, 1)
 					chassis.spark_system.start()
 			else if(isfloorturf(target))

code/game/mecha/mech_bay.dm

@@ -5,7 +5,7 @@
 	icon_state = "recharge_floor"                           //        Some people just want to watch the world burn i guess
 
 /turf/open/floor/mech_bay_recharge_floor/break_tile()
-	ScrapeAway()
+	ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/mech_bay_recharge_floor/airless
 	icon_state = "recharge_floor_asteroid"

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

@@ -121,7 +121,7 @@
 	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/melee/misc.dm

@@ -491,7 +491,7 @@
 
 /obj/item/melee/supermatter_sword/proc/consume_turf(turf/T)
 	var/oldtype = T.type
-	var/turf/newT = T.ScrapeAway()
+	var/turf/newT = T.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	if(newT.type == oldtype)
 		return
 	playsound(T, 'sound/effects/supermatter.ogg', 50, 1)

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

@@ -195,7 +195,7 @@
 			var/turf/T = usr.drop_location()
 			if(!isturf(T))
 				return
-			T.PlaceOnTop(R.result_type)
+			T.PlaceOnTop(R.result_type, flags = CHANGETURF_INHERIT_AIR)
 		else
 			O = new R.result_type(usr.drop_location())
 		if(O)

code/game/objects/items/twohanded.dm

@@ -734,7 +734,7 @@
 		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/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/lavaland/necropolis_tendril.dm

@@ -93,5 +93,5 @@ GLOBAL_LIST_INIT(tendrils, list())
 	visible_message("<span class='boldannounce'>The tendril falls inward, the ground around it widening into a yawning chasm!</span>")
 	for(var/turf/T in range(2,src))
 		if(!T.density)
-			T.TerraformTurf(/turf/open/chasm/lavaland, /turf/open/chasm/lavaland)
+			T.TerraformTurf(/turf/open/chasm/lavaland, /turf/open/chasm/lavaland, flags = CHANGETURF_INHERIT_AIR)
 	qdel(src)

code/game/objects/structures/stairs.dm

@@ -91,13 +91,13 @@
 /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)
 	return isTerminator()

code/game/turfs/openspace/openspace.dm

@@ -31,7 +31,7 @@
 	if(!T)
 		vis_contents.len = 0
 		if(prune_on_fail)
-			ChangeTurf(/turf/open/floor/plating)
+			ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 		return FALSE
 	if(init)
 		vis_contents += T
@@ -101,7 +101,7 @@
 				qdel(L)
 				playsound(src, 'sound/weapons/genhit.ogg', 50, 1)
 				to_chat(user, "<span class='notice'>You build a floor.</span>")
-				PlaceOnTop(/turf/open/floor/plating)
+				PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			else
 				to_chat(user, "<span class='warning'>You need one floor tile to build a floor!</span>")
 		else

code/game/turfs/simulated/chasm.dm

@@ -38,7 +38,7 @@
 	switch(passed_mode)
 		if(RCD_FLOORWALL)
 			to_chat(user, "<span class='notice'>You build a floor.</span>")
-			PlaceOnTop(/turf/open/floor/plating)
+			PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			return TRUE
 	return FALSE
 
@@ -70,7 +70,7 @@
 				playsound(src, 'sound/weapons/genhit.ogg', 50, 1)
 				to_chat(user, "<span class='notice'>You build a floor.</span>")
 				// Create a floor, which has this chasm underneath it
-				PlaceOnTop(/turf/open/floor/plating)
+				PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			else
 				to_chat(user, "<span class='warning'>You need one floor tile to build a floor!</span>")
 		else

code/game/turfs/simulated/floor.dm

@@ -63,29 +63,29 @@
 	if(severity != 1 && shielded && target != src)
 		return
 	if(target == src)
-		ScrapeAway()
+		ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		return
 	if(target != null)
 		severity = 3
 
 	switch(severity)
 		if(1)
-			ScrapeAway(2)
+			ScrapeAway(2, flags = CHANGETURF_INHERIT_AIR)
 		if(2)
 			switch(pick(1,2;75,3))
 				if(1)
 					if(!length(baseturfs) || !ispath(baseturfs[baseturfs.len-1], /turf/open/floor))
-						ScrapeAway()
+						ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 						ReplaceWithLattice()
 					else
-						ScrapeAway(2)
+						ScrapeAway(2, flags = CHANGETURF_INHERIT_AIR)
 					if(prob(33))
 						new /obj/item/stack/sheet/metal(src)
 				if(2)
-					ScrapeAway(2)
+					ScrapeAway(2, flags = CHANGETURF_INHERIT_AIR)
 				if(3)
 					if(prob(80))
-						ScrapeAway()
+						ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 					else
 						break_tile()
 					hotspot_expose(1000,CELL_VOLUME)
@@ -136,7 +136,7 @@
 	burnt = 1
 
 /turf/open/floor/proc/make_plating()
-	return ScrapeAway()
+	return ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/ChangeTurf(path, new_baseturf, flags)
 	if(!isfloorturf(src))
@@ -215,15 +215,15 @@
 /turf/open/floor/narsie_act(force, ignore_mobs, probability = 20)
 	. = ..()
 	if(.)
-		ChangeTurf(/turf/open/floor/engine/cult)
+		ChangeTurf(/turf/open/floor/engine/cult, flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/ratvar_act(force, ignore_mobs)
 	. = ..()
 	if(.)
-		ChangeTurf(/turf/open/floor/clockwork)
+		ChangeTurf(/turf/open/floor/clockwork, flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/acid_melt()
-	ScrapeAway()
+	ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/rcd_vals(mob/user, obj/item/construction/rcd/the_rcd)
 	switch(the_rcd.mode)
@@ -269,7 +269,7 @@
 			A.autoclose = TRUE
 			return TRUE
 		if(RCD_DECONSTRUCT)
-			if(ScrapeAway() == src)
+			if(ScrapeAway(flags = CHANGETURF_INHERIT_AIR) == src)
 				return FALSE
 			to_chat(user, "<span class='notice'>You deconstruct [src].</span>")
 			return TRUE

code/game/turfs/simulated/floor/plating.dm

@@ -61,7 +61,7 @@
 			to_chat(user, "<span class='notice'>You begin reinforcing the floor...</span>")
 			if(do_after(user, 30, target = src))
 				if (R.get_amount() >= 2 && !istype(src, /turf/open/floor/engine))
-					PlaceOnTop(/turf/open/floor/engine)
+					PlaceOnTop(/turf/open/floor/engine, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					R.use(2)
 					to_chat(user, "<span class='notice'>You reinforce the floor.</span>")
@@ -76,7 +76,7 @@
 			var/obj/item/stack/tile/W = C
 			if(!W.use(1))
 				return
-			var/turf/open/floor/T = PlaceOnTop(W.turf_type)
+			var/turf/open/floor/T = PlaceOnTop(W.turf_type, flags = CHANGETURF_INHERIT_AIR)
 			if(istype(W, /obj/item/stack/tile/light)) //TODO: get rid of this ugly check somehow
 				var/obj/item/stack/tile/light/L = W
 				var/turf/open/floor/light/F = T
@@ -118,7 +118,7 @@
 				qdel(L)
 			to_chat(user, "<span class='notice'>You reinforce the foamed plating with tiling.</span>")
 			playsound(src, 'sound/weapons/Genhit.ogg', 50, TRUE)
-			ChangeTurf(/turf/open/floor/plating)
+			ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 	else
 		playsound(src, 'sound/weapons/tap.ogg', 100, TRUE) //The attack sound is muffled by the foam itself
 		user.changeNext_move(CLICK_CD_MELEE)
@@ -126,7 +126,7 @@
 		if(prob(I.force * 20 - 25))
 			user.visible_message("<span class='danger'>[user] smashes through [src]!</span>", \
 							"<span class='danger'>You smash through [src] with [I]!</span>")
-			ScrapeAway()
+			ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		else
 			to_chat(user, "<span class='danger'>You hit [src], to no effect!</span>")
 
@@ -137,13 +137,13 @@
 /turf/open/floor/plating/foam/rcd_act(mob/user, obj/item/construction/rcd/the_rcd, passed_mode)
 	if(passed_mode == RCD_FLOORWALL)
 		to_chat(user, "<span class='notice'>You build a floor.</span>")
-		ChangeTurf(/turf/open/floor/plating)
+		ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 		return TRUE
 	return FALSE
 
 /turf/open/floor/plating/foam/ex_act()
 	..()
-	ScrapeAway()
+	ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/plating/foam/tool_act(mob/living/user, obj/item/I, tool_type)
 	return

code/game/turfs/simulated/floor/reinf_floor.dm

@@ -44,7 +44,7 @@
 			return TRUE
 		if(floor_tile)
 			new floor_tile(src, 2)
-		ScrapeAway()
+		ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	return TRUE
 
 /turf/open/floor/engine/acid_act(acidpwr, acid_volume)
@@ -57,23 +57,23 @@
 	if(severity != 1 && shielded && target != src)
 		return
 	if(target == src)
-		ScrapeAway()
+		ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		return
 	switch(severity)
 		if(1)
 			if(prob(80))
 				if(!length(baseturfs) || !ispath(baseturfs[baseturfs.len-1], /turf/open/floor))
-					ScrapeAway()
+					ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 					ReplaceWithLattice()
 				else
-					ScrapeAway(2)
+					ScrapeAway(2, flags = CHANGETURF_INHERIT_AIR)
 			else if(prob(50))
-				ScrapeAway(2)
+				ScrapeAway(2, flags = CHANGETURF_INHERIT_AIR)
 			else
-				ScrapeAway()
+				ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		if(2)
 			if(prob(50))
-				ScrapeAway()
+				ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/engine/singularity_pull(S, current_size)
 	..()

code/game/turfs/simulated/lava.dm

@@ -65,7 +65,7 @@
 	switch(passed_mode)
 		if(RCD_FLOORWALL)
 			to_chat(user, "<span class='notice'>You build a floor.</span>")
-			PlaceOnTop(/turf/open/floor/plating)
+			PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			return TRUE
 	return FALSE
 

code/game/turfs/space/space.dm

@@ -124,7 +124,7 @@
 				qdel(L)
 				playsound(src, 'sound/weapons/genhit.ogg', 50, 1)
 				to_chat(user, "<span class='notice'>You build a floor.</span>")
-				PlaceOnTop(/turf/open/floor/plating)
+				PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			else
 				to_chat(user, "<span class='warning'>You need one floor tile to build a floor!</span>")
 		else
@@ -211,7 +211,7 @@
 	switch(passed_mode)
 		if(RCD_FLOORWALL)
 			to_chat(user, "<span class='notice'>You build a floor.</span>")
-			PlaceOnTop(/turf/open/floor/plating)
+			PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			return TRUE
 	return FALSE
 

code/game/turfs/turf.dm

@@ -404,7 +404,7 @@
 				continue
 			if(O.invisibility == INVISIBILITY_MAXIMUM)
 				O.singularity_act()
-	ScrapeAway()
+	ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	return(2)
 
 /turf/proc/can_have_cabling()
@@ -567,7 +567,7 @@
 //Whatever happens after high temperature fire dies out or thermite reaction works.
 //Should return new turf
 /turf/proc/Melt()
-	return ScrapeAway()
+	return ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/bullet_act(obj/item/projectile/P)
 	. = ..()

code/modules/antagonists/clockcult/clock_items/replica_fabricator.dm

@@ -139,7 +139,7 @@
 	var/new_thing_type = fabrication_values["new_obj_type"]
 	if(isturf(target)) //if our target is a turf, we're just going to ChangeTurf it and assume it'll work out.
 		var/turf/T = target
-		T.ChangeTurf(new_thing_type)
+		T.ChangeTurf(new_thing_type, flags = CHANGETURF_INHERIT_AIR)
 	else
 		if(new_thing_type)
 			if(fabrication_values["dir_in_new"])

code/modules/antagonists/clockcult/clock_structures/wall_gear.dm

@@ -59,7 +59,7 @@
 				if(anchored)
 					T.PlaceOnTop(/turf/closed/wall/clockwork)
 				else
-					T.PlaceOnTop(/turf/open/floor/clockwork)
+					T.PlaceOnTop(/turf/open/floor/clockwork, flags = CHANGETURF_INHERIT_AIR)
 					new /obj/structure/falsewall/brass(T)
 				qdel(src)
 			else

code/modules/antagonists/cult/cult_structures.dm

@@ -213,9 +213,9 @@
 		var/turf/T = safepick(validturfs)
 		if(T)
 			if(istype(T, /turf/open/floor/plating))
-				T.PlaceOnTop(/turf/open/floor/engine/cult)
+				T.PlaceOnTop(/turf/open/floor/engine/cult, flags = CHANGETURF_INHERIT_AIR)
 			else
-				T.ChangeTurf(/turf/open/floor/engine/cult)
+				T.ChangeTurf(/turf/open/floor/engine/cult, flags = CHANGETURF_INHERIT_AIR)
 		else
 			var/turf/open/floor/engine/cult/F = safepick(cultturfs)
 			if(F)

code/modules/buildmode/submodes/basic.dm

@@ -22,9 +22,9 @@
 	if(istype(object,/turf) && left_click && !alt_click && !ctrl_click)
 		var/turf/T = object
 		if(isspaceturf(object))
-			T.PlaceOnTop(/turf/open/floor/plating)
+			T.PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 		else if(isplatingturf(object))
-			T.PlaceOnTop(/turf/open/floor/plasteel)
+			T.PlaceOnTop(/turf/open/floor/plasteel, flags = CHANGETURF_INHERIT_AIR)
 		else if(isfloorturf(object))
 			T.PlaceOnTop(/turf/closed/wall)
 		else if(iswallturf(object))
@@ -35,7 +35,7 @@
 		log_admin("Build Mode: [key_name(c)] deleted [object] at [AREACOORD(object)]")
 		if(isturf(object))
 			var/turf/T = object
-			T.ScrapeAway()
+			T.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 		else if(isobj(object))
 			qdel(object)
 		return

code/modules/mining/lavaland/necropolis_chests.dm

@@ -957,7 +957,7 @@
 			timer = world.time + create_delay + 1
 			if(do_after(user, create_delay, target = T))
 				var/old_name = T.name
-				if(T.TerraformTurf(turf_type))
+				if(T.TerraformTurf(turf_type, flags = CHANGETURF_INHERIT_AIR))
 					user.visible_message("<span class='danger'>[user] turns \the [old_name] into [transform_string]!</span>")
 					message_admins("[ADMIN_LOOKUPFLW(user)] fired the lava staff at [ADMIN_VERBOSEJMP(T)]")
 					log_game("[key_name(user)] fired the lava staff at [AREACOORD(T)].")
@@ -968,7 +968,7 @@
 			qdel(L)
 		else
 			var/old_name = T.name
-			if(T.TerraformTurf(reset_turf_type))
+			if(T.TerraformTurf(reset_turf_type, flags = CHANGETURF_INHERIT_AIR))
 				user.visible_message("<span class='danger'>[user] turns \the [old_name] into [reset_string]!</span>")
 				timer = world.time + reset_cooldown
 				playsound(T,'sound/magic/fireball.ogg', 200, 1)

code/modules/mob/living/simple_animal/bot/floorbot.dm

@@ -325,9 +325,9 @@
 		sleep(50)
 		if(mode == BOT_REPAIRING && src.loc == target_turf)
 			if(autotile) //Build the floor and include a tile.
-				target_turf.PlaceOnTop(/turf/open/floor/plasteel)
+				target_turf.PlaceOnTop(/turf/open/floor/plasteel, flags = CHANGETURF_INHERIT_AIR)
 			else //Build a hull plating without a floor tile.
-				target_turf.PlaceOnTop(/turf/open/floor/plating)
+				target_turf.PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 
 	else
 		var/turf/open/floor/F = target_turf
@@ -341,7 +341,7 @@
 			if(mode == BOT_REPAIRING && F && src.loc == F)
 				F.broken = FALSE 
 				F.burnt = FALSE
-				F.PlaceOnTop(/turf/open/floor/plasteel)
+				F.PlaceOnTop(/turf/open/floor/plasteel, flags = CHANGETURF_INHERIT_AIR)
 
 		if(replacetiles && F.type != initial(tiletype.turf_type) && specialtiles && !isplatingturf(F))
 			anchored = TRUE
@@ -352,7 +352,7 @@
 			if(mode == BOT_REPAIRING && F && src.loc == F)
 				F.broken = FALSE
 				F.burnt = FALSE
-				F.PlaceOnTop(initial(tiletype.turf_type))
+				F.PlaceOnTop(initial(tiletype.turf_type), flags = CHANGETURF_INHERIT_AIR)
 				specialtiles -= 1
 				if(specialtiles == 0)
 					speak("Requesting refill of custom floortiles to continue replacing.")

code/modules/mob/living/simple_animal/hostile/megafauna/colossus.dm

@@ -525,10 +525,7 @@ Difficulty: Very Hard
 				if(isturf(Stuff))
 					var/turf/T = Stuff
 					if((isspaceturf(T) || isfloorturf(T)) && NewTerrainFloors)
-						var/turf/open/O = T.ChangeTurf(NewTerrainFloors)
+						var/turf/open/O = T.ChangeTurf(NewTerrainFloors, flags = CHANGETURF_INHERIT_AIR)
-						if(O.air)
-							var/datum/gas_mixture/G = O.air
-							G.copy_from_turf(O)
 						if(prob(florachance) && NewFlora.len && !is_blocked_turf(O, TRUE))
 							var/atom/Picked = pick(NewFlora)
 							new Picked(O)

code/modules/mob/living/simple_animal/hostile/megafauna/drake.dm

@@ -190,7 +190,7 @@ Difficulty: Medium
 		if(istype(T, /turf/open/indestructible))
 			continue
 		if(!istype(T, /turf/closed/indestructible))
-			T.ChangeTurf(/turf/open/floor/plating/asteroid/basalt/lava_land_surface)
+			T.ChangeTurf(/turf/open/floor/plating/asteroid/basalt/lava_land_surface, flags = CHANGETURF_INHERIT_AIR)
 		else
 			indestructible_turfs += T
 	SLEEP_CHECK_DEATH(10) // give them a bit of time to realize what attack is actually happening
@@ -456,9 +456,9 @@ Difficulty: Medium
 	if(!istype(T, /turf/closed) && !istype(T, /turf/open/lava))
 		var/lava_turf = /turf/open/lava/smooth
 		var/reset_turf = T.type
-		T.ChangeTurf(lava_turf)
+		T.ChangeTurf(lava_turf, flags = CHANGETURF_INHERIT_AIR)
 		sleep(reset_time)
-		T.ChangeTurf(reset_turf)
+		T.ChangeTurf(reset_turf, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/effect/temp_visual/drakewall
 	desc = "An ash drakes true flame."

code/modules/projectiles/projectile/magic.dm

@@ -119,7 +119,7 @@
 /obj/item/projectile/magic/door/proc/CreateDoor(turf/T)
 	var/door_type = pick(door_types)
 	var/obj/structure/mineral_door/D = new door_type(T)
-	T.ChangeTurf(/turf/open/floor/plating)
+	T.ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 	D.Open()
 
 /obj/item/projectile/magic/door/proc/OpenDoor(var/obj/machinery/door/D)

code/modules/reagents/chemistry/reagents/other_reagents.dm

@@ -1353,7 +1353,7 @@
 /datum/reagent/carpet/reaction_turf(turf/T, reac_volume)
 	if(isplatingturf(T) || istype(T, /turf/open/floor/plasteel))
 		var/turf/open/floor/F = T
-		F.PlaceOnTop(/turf/open/floor/carpet)
+		F.PlaceOnTop(/turf/open/floor/carpet, flags = CHANGETURF_INHERIT_AIR)
 	..()
 
 /datum/reagent/bromine

code/modules/reagents/chemistry/reagents/pyrotechnic_reagents.dm

@@ -47,7 +47,7 @@
 	if(isplatingturf(T))
 		var/turf/open/floor/plating/F = T
 		if(prob(10 + F.burnt + 5*F.broken)) //broken or burnt plating is more susceptible to being destroyed
-			F.ScrapeAway()
+			F.ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	if(isfloorturf(T))
 		var/turf/open/floor/F = T
 		if(prob(reac_volume))

code/modules/ruins/objects_and_mobs/sin_ruins.dm

@@ -115,7 +115,7 @@
 	if (levels.len)
 		dest = locate(T.x, T.y, pick(levels))
 
-	T.ChangeTurf(/turf/open/chasm)
+	T.ChangeTurf(/turf/open/chasm, flags = CHANGETURF_INHERIT_AIR)
 	var/turf/open/chasm/C = T
 	C.set_target(dest)
 	C.drop(user)

code/modules/spells/spell_types/conjure.dm

@@ -31,7 +31,7 @@
 		if(ispath(summoned_object_type, /turf))
 			var/turf/O = spawn_place
 			var/N = summoned_object_type
-			O.ChangeTurf(N)
+			O.ChangeTurf(N, flags = CHANGETURF_INHERIT_AIR)
 		else
 			var/atom/summoned_object = new summoned_object_type(spawn_place)
 

code/modules/spells/spell_types/devil.dm

@@ -234,7 +234,7 @@
 		dancefloor_exists = FALSE
 		for(var/i in 1 to dancefloor_turfs.len)
 			var/turf/T = dancefloor_turfs[i]
-			T.ChangeTurf(dancefloor_turfs_types[i])
+			T.ChangeTurf(dancefloor_turfs_types[i], flags = CHANGETURF_INHERIT_AIR)
 	else
 		var/list/funky_turfs = RANGE_TURFS(1, user)
 		for(var/turf/closed/solid in funky_turfs)
@@ -248,7 +248,7 @@
 			var/turf/T = t
 			dancefloor_turfs[i] = T
 			dancefloor_turfs_types[i] = T.type
-			T.ChangeTurf((i % 2 == 0) ? /turf/open/floor/light/colour_cycle/dancefloor_a : /turf/open/floor/light/colour_cycle/dancefloor_b)
+			T.ChangeTurf((i % 2 == 0) ? /turf/open/floor/light/colour_cycle/dancefloor_a : /turf/open/floor/light/colour_cycle/dancefloor_b, flags = CHANGETURF_INHERIT_AIR)
 			i++
 
 /datum/effect_system/smoke_spread/transparent/dancefloor_devil