better dirt persistence

code/game/objects/effects/decals/Cleanable/misc.dm

@@ -38,11 +38,11 @@
 	icon_state = "dirt"
 	mouse_opacity = 0
 
-/obj/effect/decal/cleanable/Initialize(var/mapload, var/_age)
+/obj/effect/decal/cleanable/dirt/Initialize(var/mapload, var/_age, var/dirt)
 	.=..()
 	var/turf/simulated/our_turf = src.loc
-	if(our_turf && istype(our_turf) && our_turf.can_dirty && _age)
-		our_turf.dirt = 101
+	if(dirt && our_turf && istype(our_turf) && our_turf.can_dirty)
+		our_turf.dirt = dirt
 
 /obj/effect/decal/cleanable/flour
 	name = "flour"

code/modules/persistence/effects/filth.dm

@@ -1,6 +1,7 @@
 /datum/persistent/filth
 	name = "filth"
 	entries_expire_at = 4 // 4 rounds, 24 hours.
+	var/saves_dirt = TRUE //VOREStation edit
 
 /datum/persistent/filth/IsValidEntry(var/atom/entry)
 	. = ..() && entry.invisibility == 0

code/modules/persistence/effects/filth_vr.dm

@@ -0,0 +1,21 @@
+/datum/persistent/filth/CheckTokenSanity(var/list/token)
+	. = ..()
+	return saves_dirt ? . && isnum(token["dirt"]) : .
+
+/datum/persistent/filth/CreateEntryInstance(var/turf/creating, var/list/token)
+	var/_path = token["path"]
+	if (saves_dirt)
+		new _path(creating, token["age"]+1, token["dirt"])
+	else
+		new _path(creating, token["age"]+1)
+
+/datum/persistent/filth/proc/GetEntryDirt(var/atom/entry)
+	var/turf/simulated/T = get_turf(entry)
+	if (istype(T))
+		return T.dirt
+	return 0
+
+/datum/persistent/filth/CompileEntry(var/atom/entry)
+	. = ..()
+	if (saves_dirt)
+		LAZYADDASSOC(., "dirt", GetEntryDirt(entry))

code/modules/persistence/effects/trash.dm

@@ -1,5 +1,6 @@
 /datum/persistent/filth/trash
 	name = "trash"
+	saves_dirt = FALSE //VOREStation edit
 
 /datum/persistent/filth/trash/CheckTurfContents(var/turf/T, var/list/tokens)
 	var/too_much_trash = 0

vorestation.dme

@@ -3456,6 +3456,7 @@
 #include "code\modules\persistence\serialize.dm"
 #include "code\modules\persistence\datum\persistence_datum.dm"
 #include "code\modules\persistence\effects\filth.dm"
+#include "code\modules\persistence\effects\filth_vr.dm"
 #include "code\modules\persistence\effects\graffiti.dm"
 #include "code\modules\persistence\effects\paper.dm"
 #include "code\modules\persistence\effects\paper_sticky.dm"