Smooth z1 and z2 on initialize.

code/__HELPERS/icon_smoothing.dm

@@ -276,16 +276,22 @@
 		return A && A.type == source.type ? A : null
 
 //Icon smoothing helpers
-/proc/smooth_zlevel(var/zlevel)
+/proc/smooth_zlevel(var/zlevel, now = FALSE)
 	var/list/away_turfs = block(locate(1, 1, zlevel), locate(world.maxx, world.maxy, zlevel))
 	for(var/V in away_turfs)
 		var/turf/T = V
 		if(T.smooth)
-			queue_smooth(T)
+			if(now)
+				smooth_icon(T)
+			else
+				queue_smooth(T)
 		for(var/R in T)
 			var/atom/A = R
 			if(A.smooth)
-				queue_smooth(A)
+				if(now)
+					smooth_icon(A)
+				else
+					queue_smooth(A)
 
 /atom/proc/clear_smooth_overlays()
 	overlays -= top_left_corner

code/controllers/subsystem/icon_smooth.dm

@@ -13,3 +13,12 @@ var/datum/subsystem/icon_smooth/SSicon_smooth
 	for(var/atom in smooth_queue)
 		ss_smooth_icon(atom)
 		smooth_queue -= atom
+
+/datum/subsystem/icon_smooth/Initialize()
+	smooth_zlevel(1,TRUE)
+	smooth_zlevel(2,TRUE)
+	for(var/V in smooth_queue)
+		var/atom/A = V
+		if(A.z == 1 || A.z == 2)
+			smooth_queue -= A
+	..()