Add fake ambient occlusion

code/game/objects/structures/aliens.dm

@@ -113,6 +113,7 @@
 	anchored = TRUE
 	density = FALSE
 	layer = TURF_LAYER
+	plane = FLOOR_PLANE
 	icon_state = "weeds"
 	max_integrity = 15
 	var/obj/structure/alien/weeds/node/linked_node = null

code/game/objects/structures/lattice.dm

@@ -7,6 +7,7 @@
 	anchored = 1.0
 	armor = list(melee = 50, bullet = 0, laser = 0, energy = 0, bomb = 0, bio = 0, rad = 0)
 	layer = 2.3 //under pipes
+	plane = FLOOR_PLANE
 	//	flags = CONDUCT
 
 /obj/structure/lattice/New()