More helpers and a smol fix

code/datums/elements/turf_transparency.dm

@@ -34,6 +34,8 @@
 		if(!show_bottom_level(our_turf) && prune_on_fail) //If we cant show whats below, and we prune on fail, change the turf to plating as a fallback
 			our_turf.ChangeTurf(/turf/simulated/floor/plating)
 			return FALSE
+		else
+			return TRUE
 	if(init)
 		below_turf?.update_icon() // So the 'ceiling-less' overlay gets added.
 		our_turf.vis_contents += below_turf
@@ -67,11 +69,11 @@
 /datum/element/turf_z_transparency/proc/show_bottom_level(turf/our_turf)
 	if(!show_bottom_level)
 		return FALSE
-	var/turf/path = get_base_turf(our_turf.z) || /turf/space
+	var/turf/path = get_base_turf_by_area(our_turf) || /turf/space
 	if(!ispath(path))
 		path = text2path(path)
 		if(!ispath(path))
-			warning("Z-level [our_turf.z] has invalid baseturf '[get_base_turf(our_turf.z)]'")
+			warning("Z-level [our_turf] has invalid baseturf '[get_base_turf_by_area(our_turf)]' in area '[get_area(our_turf)]'")
 			path = /turf/space
 	
 	var/do_plane = ispath(path, /turf/space) ? SPACE_PLANE : null

code/game/turfs/flooring/flooring_decals.dm

@@ -30,18 +30,25 @@ var/list/floor_decals = list()
 		set_dir(supplied_dir) // TODO - Why can't this line be done in initialize/New()?
 	var/turf/T = get_turf(src)
 	if(istype(T, /turf/simulated/floor) || istype(T, /turf/unsimulated/floor) || istype(T, /turf/simulated/shuttle/floor))
-		var/cache_key = "[alpha]-[color]-[dir]-[icon_state]-[T.layer]"
+		var/cache_key = get_cache_key(T)
 		var/image/I = floor_decals[cache_key]
 		if(!I)
-			I = image(icon = icon, icon_state = icon_state, dir = dir)
-			I.layer = MAPPER_DECAL_LAYER
-			I.color = color
-			I.alpha = alpha
+			I = make_decal_image()
 			floor_decals[cache_key] = I
 		LAZYADD(T.decals, I) // Add to its decals list (so it remembers to re-apply after it cuts overlays)
 		T.add_overlay(I) // Add to its current overlays too.
 		return T
 
+/obj/effect/floor_decal/proc/make_decal_image()
+	var/image/I = image(icon = icon, icon_state = icon_state, dir = dir)
+	I.layer = MAPPER_DECAL_LAYER
+	I.color = color
+	I.alpha = alpha
+	return I
+
+/obj/effect/floor_decal/proc/get_cache_key(var/turf/T)
+	return "[alpha]-[color]-[dir]-[icon_state]-[T.layer]"
+
 /obj/effect/floor_decal/reset
 	name = "reset marker"
 

code/modules/overmap/ships/engines/ion_thruster.dm

@@ -52,15 +52,17 @@
 /obj/machinery/ion_engine/Initialize()
 	. = ..()
 	controller = new(src)
-
-	var/image/i = image('icons/turf/shuttle_parts_vr.dmi', "ion_overlay") // VOREStation Edit
-	i.plane = PLANE_LIGHTING_ABOVE // VOREStation Edit
-	add_overlay(i) // VOREStation Edit
+	add_glow()
 
 /obj/machinery/ion_engine/Destroy()
 	QDEL_NULL(controller)
 	. = ..()
 
+/obj/machinery/ion_engine/proc/add_glow()
+	var/image/i = image('icons/turf/shuttle_parts_vr.dmi', "ion_overlay") // VOREStation Edit
+	i.plane = PLANE_LIGHTING_ABOVE // VOREStation Edit
+	add_overlay(i) // VOREStation Edit
+
 /obj/machinery/ion_engine/proc/get_status()
 	. = list()
 	.+= "Location: [get_area(src)]."