Plane adjustments on several low layer objects. (#12286)

code/game/gamemodes/gangs/gang_decals.dm

@@ -10,7 +10,7 @@
 /obj/effect/decal/cleanable/crayon/gang
 	icon = 'icons/effects/crayondecal.dmi'
 	layer = ABOVE_NORMAL_TURF_LAYER //Harder to hide
-	plane = GAME_PLANE
+	plane = ABOVE_WALL_PLANE
 	do_icon_rotate = FALSE //These are designed to always face south, so no rotation please.
 	var/datum/team/gang/gang
 

code/game/machinery/hologram.dm

@@ -34,7 +34,7 @@ GLOBAL_LIST_EMPTY(network_holopads)
 	desc = "It's a floor-mounted device for projecting holographic images."
 	icon_state = "holopad0"
 	layer = LOW_OBJ_LAYER
-	plane = FLOOR_PLANE
+	plane = ABOVE_WALL_PLANE
 	flags_1 = HEAR_1
 	use_power = IDLE_POWER_USE
 	idle_power_usage = 5

code/game/objects/effects/decals/crayon.dm

@@ -3,7 +3,7 @@
 	desc = "Graffiti. Damn kids."
 	icon = 'icons/effects/crayondecal.dmi'
 	icon_state = "rune1"
-	plane = GAME_PLANE //makes the graffiti visible over a wall.
+	plane = ABOVE_WALL_PLANE //makes the graffiti visible over a wall.
 	gender = NEUTER
 	mergeable_decal = FALSE
 	var/do_icon_rotate = TRUE

code/game/objects/effects/decals/decal.dm

@@ -35,6 +35,7 @@
 	icon = 'icons/turf/decals.dmi'
 	icon_state = "warningline"
 	layer = TURF_DECAL_LAYER
+	plane = ABOVE_WALL_PLANE
 
 /obj/effect/turf_decal/Initialize()
 	..()

code/game/objects/effects/landmarks.dm

@@ -469,6 +469,7 @@ INITIALIZE_IMMEDIATE(/obj/effect/landmark/start/new_player)
 /obj/effect/landmark/stationroom
 	var/list/templates = list()
 	layer = BULLET_HOLE_LAYER
+	plane = ABOVE_WALL_PLANE
 
 /obj/effect/landmark/stationroom/New()
 	..()

code/game/turfs/simulated/walls.dm

@@ -290,7 +290,7 @@
 	if(LAZYLEN(dent_decals) >= MAX_DENT_DECALS)
 		return
 
-	var/mutable_appearance/decal = mutable_appearance('icons/effects/effects.dmi', "", BULLET_HOLE_LAYER)
+	var/mutable_appearance/decal = mutable_appearance('icons/effects/effects.dmi', "", BULLET_HOLE_LAYER, ABOVE_WALL_PLANE)
 	switch(denttype)
 		if(WALL_DENT_SHOT)
 			decal.icon_state = "bullet_hole"