Removed turf_animation for now, ported vg hasproximity optimisation. Rewrite and refactor of how turfs handle icon updates, edge smoothing and

construction/deconstruction. Major map rework/changes.

code/game/turfs/space/space.dm

@@ -14,6 +14,15 @@
 	update_starlight()
 	..()
 
+/turf/space/is_space()
+	return 1
+
+// override for space turfs, since they should never hide anything
+/turf/space/levelupdate()
+	for(var/obj/O in src)
+		if(O.level == 1)
+			O.hide(0)
+
 /turf/space/proc/update_starlight()
 	if(!config.starlight)
 		return
@@ -35,16 +44,16 @@
 			ReplaceWithLattice()
 		return
 
-	if (istype(C, /obj/item/stack/tile/steel))
+	if (istype(C, /obj/item/stack/tile/floor))
 		var/obj/structure/lattice/L = locate(/obj/structure/lattice, src)
 		if(L)
-			var/obj/item/stack/tile/steel/S = C
+			var/obj/item/stack/tile/floor/S = C
 			if (S.get_amount() < 1)
 				return
 			qdel(L)
 			playsound(src, 'sound/weapons/Genhit.ogg', 50, 1)
-			S.build(src)
 			S.use(1)
+			ChangeTurf(/turf/simulated/floor/airless)
 			return
 		else
 			user << "<span class='warning'>The plating is going to need some support.</span>"