Adding Linda.

code/game/objects/effects/aliens.dm

@@ -36,18 +36,6 @@
 	health = 120
 
 
-/obj/structure/alien/resin/New()
-	..()
-	var/turf/T = get_turf(src)
-	T.thermal_conductivity = WALL_HEAT_TRANSFER_COEFFICIENT
-
-
-/obj/structure/alien/resin/Del()
-	var/turf/T = get_turf(src)
-	T.thermal_conductivity = initial(T.thermal_conductivity)
-	..()
-
-
 /obj/structure/alien/resin/proc/healthcheck()
 	if(health <=0)
 		del(src)

code/game/objects/effects/effect_system.dm

@@ -915,16 +915,21 @@ steam.start() -- spawns the effect
 
 	New()
 		..()
-		update_nearby_tiles(1)
+		air_update_turf(1)
 
 
 
 	Del()
 
 		density = 0
-		update_nearby_tiles(1)
+		air_update_turf(1)
 		..()
 
+	Move()
+		air_update_turf(1)
+		..()
+		air_update_turf(1)
+
 	proc/updateicon()
 		if(metal == 1)
 			icon_state = "metalfoam"
@@ -985,52 +990,8 @@ steam.start() -- spawns the effect
 		if(air_group) return 0
 		return !density
 
-
-	// shouldn't this be a general procedure?
-	// not sure if this neccessary or overkill
-	proc/update_nearby_tiles(need_rebuild)
-		if(!air_master) return 0
-
-		var/turf/simulated/source = loc
-		var/turf/simulated/north = get_step(source,NORTH)
-		var/turf/simulated/south = get_step(source,SOUTH)
-		var/turf/simulated/east = get_step(source,EAST)
-		var/turf/simulated/west = get_step(source,WEST)
-
-		if(need_rebuild)
-			if(istype(source)) //Rebuild/update nearby group geometry
-				if(source.parent)
-					air_master.groups_to_rebuild += source.parent
-				else
-					air_master.tiles_to_update += source
-			if(istype(north))
-				if(north.parent)
-					air_master.groups_to_rebuild += north.parent
-				else
-					air_master.tiles_to_update += north
-			if(istype(south))
-				if(south.parent)
-					air_master.groups_to_rebuild += south.parent
-				else
-					air_master.tiles_to_update += south
-			if(istype(east))
-				if(east.parent)
-					air_master.groups_to_rebuild += east.parent
-				else
-					air_master.tiles_to_update += east
-			if(istype(west))
-				if(west.parent)
-					air_master.groups_to_rebuild += west.parent
-				else
-					air_master.tiles_to_update += west
-		else
-			if(istype(source)) air_master.tiles_to_update += source
-			if(istype(north)) air_master.tiles_to_update += north
-			if(istype(south)) air_master.tiles_to_update += south
-			if(istype(east)) air_master.tiles_to_update += east
-			if(istype(west)) air_master.tiles_to_update += west
-
-		return 1
+	CanAtmosPass()
+		return !density
 
 /datum/effect/effect/system/reagents_explosion
 	var/amount 						// TNT equivalent

code/game/objects/effects/mines.dm

@@ -46,39 +46,12 @@
 		del(src)
 
 /obj/effect/mine/proc/triggern2o(obj)
-	//example: n2o triggerproc
-	//note: im lazy
-
-	for (var/turf/simulated/floor/target in range(1,src))
-		if(!target.blocks_air)
-			if(target.parent)
-				target.parent.suspend_group_processing()
-
-			var/datum/gas_mixture/payload = new
-			var/datum/gas/sleeping_agent/trace_gas = new
-
-			trace_gas.moles = 30
-			payload += trace_gas
-
-			target.air.merge(payload)
-
+	atmos_spawn_air("n2o", 360)
 	spawn(0)
 		del(src)
 
 /obj/effect/mine/proc/triggerplasma(obj)
-	for (var/turf/simulated/floor/target in range(1,src))
-		if(!target.blocks_air)
-			if(target.parent)
-				target.parent.suspend_group_processing()
-
-			var/datum/gas_mixture/payload = new
-
-			payload.toxins = 30
-
-			target.air.merge(payload)
-
-			target.hotspot_expose(1000, CELL_VOLUME)
-
+	atmos_spawn_air("fire", 360)
 	spawn(0)
 		del(src)