changes

code/game/turfs/simulated/chasm.dm

@@ -9,6 +9,7 @@
 	canSmoothWith = list(/turf/open/floor/fakepit, /turf/open/chasm)
 	density = TRUE //This will prevent hostile mobs from pathing into chasms, while the canpass override will still let it function like an open turf
 	bullet_bounce_sound = null //abandon all hope ye who enter
+	dirt_buildup_allowed = FALSE
 
 /turf/open/chasm/Initialize()
 	. = ..()

code/game/turfs/simulated/dirtystation.dm

@@ -8,6 +8,9 @@
 //Making the station dirty, one tile at a time. Called by master controller's setup_objects
 
 /turf/open/floor/proc/MakeDirty()
+	if(CONFIG_GET(flag/persistent_debris_only))
+		return
+
 	if(prob(66))	//fastest possible exit 2/3 of the time
 		return
 
@@ -38,7 +41,7 @@
 		return
 
 		//Construction zones. Blood, sweat, and oil.  Oh, and dirt.
-	var/static/list/engine_dirt_areas = typecacheof(list(/area/engine,			
+	var/static/list/engine_dirt_areas = typecacheof(list(/area/engine,
 														/area/crew_quarters/heads/chief,
 														/area/ruin/space/derelict/assembly_line,
 														/area/science/robotics,

code/game/turfs/simulated/floor.dm

@@ -5,6 +5,7 @@
 	name = "floor"
 	icon = 'icons/turf/floors.dmi'
 	baseturfs = /turf/open/floor/plating
+	dirt_buildup_allowed = TRUE
 
 	footstep = FOOTSTEP_FLOOR
 	barefootstep = FOOTSTEP_HARD_BAREFOOT

code/game/turfs/simulated/lava.dm

@@ -6,6 +6,7 @@
 	gender = PLURAL //"That's some lava."
 	baseturfs = /turf/open/lava //lava all the way down
 	slowdown = 2
+	dirt_buildup_allowed = FALSE
 
 	light_range = 2
 	light_power = 0.75

code/game/turfs/simulated/reebe_void.dm

@@ -6,6 +6,7 @@
 	planetary_atmos = TRUE
 	bullet_bounce_sound = null //forever falling
 	tiled_dirt = FALSE
+	dirt_buildup_allowed = FALSE
 
 /turf/open/indestructible/reebe_void/Initialize(mapload)
 	. = ..()