[MIRROR] Fix up critter holes (#12500)

Co-authored-by: Killian <49700375+KillianKirilenko@users.noreply.github.com>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/game/objects/structures/ghost_pods/unified_ghost_hole.dm

@@ -5,7 +5,7 @@
 	icon_state = "rift"
 	icon_state_opened = "tendril_dead"
 	density = FALSE
-	ghost_query_type = /datum/ghost_query/maints_spawner
+	ghost_query_type = /datum/ghost_query/maints_critter
 	anchored = TRUE
 	invisibility = INVISIBILITY_OBSERVER
 	spawn_active = TRUE
@@ -45,6 +45,7 @@
 			create_lurker(user)
 	used = TRUE
 	icon_state = icon_state_opened
+	update_icon()
 	GLOB.active_ghost_pods -= src
 
 /obj/structure/ghost_pod/ghost_activated/unified_hole/proc/create_simplemob(var/mob/M)
@@ -159,6 +160,19 @@
 	. = ..()
 	GLOB.active_ghost_pods += src
 
+	update_icon()
+
+/obj/structure/ghost_pod/ghost_activated/unified_hole/update_icon()
+	cut_overlays()
+
+	if(used)
+		return
+
+	var/list/glows = list()
+	glows += mutable_appearance(icon, "rift_glow")
+	glows += emissive_appearance(icon, "rift_glow")
+	add_overlay(glows)
+
 /obj/structure/ghost_pod/ghost_activated/unified_hole/Destroy()
 	GLOB.active_ghost_pods -= src
 	. = ..()