diff --git a/code/game/turfs/space/space.dm b/code/game/turfs/space/space.dm
index 3ebc54cc4a2..16dd8580a47 100644
--- a/code/game/turfs/space/space.dm
+++ b/code/game/turfs/space/space.dm
@@ -19,7 +19,8 @@
 // Copypaste of parent for performance.
 /turf/space/Initialize()
 	appearance = SSicon_cache.space_cache["[((x + y) ^ ~(x * y) + z) % 25]"]
-	update_starlight()
+	if (config.starlight)
+		update_starlight()
 
 	if (initialized)
 		crash_with("Warning: [src]([type]) initialized multiple times!")
diff --git a/code/game/turfs/turf.dm b/code/game/turfs/turf.dm
index 74fc80fb430..16c808b8a62 100644
--- a/code/game/turfs/turf.dm
+++ b/code/game/turfs/turf.dm
@@ -350,7 +350,7 @@ var/const/enterloopsanity = 100
 		if (!above || isopenturf(above))
 			return
 
-		above.ChangeTurf(/turf/simulated/open)
+		above.ChangeToOpenturf()
 
 /turf/proc/AdjacentTurfsRanged()
 	var/static/list/allowed = typecacheof(list(
@@ -388,4 +388,4 @@ var/const/enterloopsanity = 100
 					break
 		if(add)
 			L.Add(t)
-	return L
\ No newline at end of file
+	return L
diff --git a/code/game/turfs/turf_changing.dm b/code/game/turfs/turf_changing.dm
index 9d68b1503c6..afce2070743 100644
--- a/code/game/turfs/turf_changing.dm
+++ b/code/game/turfs/turf_changing.dm
@@ -1,10 +1,10 @@
 /turf
 	var/tmp/changing_turf
+	var/openspace_override_type	// If defined, this type is spawned instead of openturfs.
 
 /turf/proc/ReplaceWithLattice()
-	src.ChangeTurf(baseturf)
-	spawn()
-		new /obj/structure/lattice( locate(src.x, src.y, src.z) )
+	ChangeTurf(baseturf)
+	new /obj/structure/lattice(src)
 
 // Removes all signs of lattice on the pos of the turf -Donkieyo
 /turf/proc/RemoveLattice()
@@ -15,12 +15,15 @@
 // Called after turf replaces old one
 /turf/proc/post_change()
 	levelupdate()
-	var/turf/simulated/open/T = GetAbove(src)
-	if(istype(T))
-		T.update_icon()
+	if (above)
+		above.update_mimic()
 
 	queue_smooth_neighbors(src)
 
+// Helper to change this turf into an appropriate openturf type, generally you should use this instead of ChangeTurf(/turf/simulated/open).
+/turf/proc/ChangeToOpenturf()
+	. = ChangeTurf(/turf/space)
+
 //Creates a new turf.
 // N is the type of the turf.
 /turf/proc/ChangeTurf(N, tell_universe = TRUE, force_lighting_update = FALSE)
@@ -31,12 +34,16 @@
 
 	// This makes sure that turfs are not changed to space when there's a multi-z turf below
 	if(N == /turf/space && HasBelow(z))
-		N = /turf/simulated/open
+		N = openspace_override_type || /turf/simulated/open/airless
 
 	var/obj/fire/old_fire = fire
 	var/old_baseturf = baseturf
-
-//	log_debug("Replacing [src.type] with [N]")
+	var/old_above = above
+	var/old_opacity = opacity
+	var/old_dynamic_lighting = dynamic_lighting
+	var/list/old_affecting_lights = affecting_lights
+	var/old_lighting_overlay = lighting_overlay
+	var/list/old_corners = corners
 
 	changing_turf = TRUE
 
@@ -46,7 +53,37 @@
 	// So we call destroy.
 	qdel(src)
 
-	var/turf/simulated/W = new N( locate(src.x, src.y, src.z) )
+	var/turf/simulated/W = new N(src)
+
+#ifndef AO_USE_LIGHTING_OPACITY
+	// If we're using opacity-based AO, this is done in recalc_atom_opacity().
+	if (permit_ao)
+		regenerate_ao()
+#endif
+
+	recalc_atom_opacity()
+	lighting_overlay = old_lighting_overlay
+	if (lighting_overlay && lighting_overlay.loc != src)
+		// This is a hack, but I can't figure out why the fuck they're not on the correct turf in the first place.
+		lighting_overlay.forceMove(src, harderforce = TRUE)
+		
+	affecting_lights = old_affecting_lights
+	corners = old_corners
+
+	if ((old_opacity != opacity) || (dynamic_lighting != old_dynamic_lighting) || force_lighting_update)
+		reconsider_lights()
+
+	if (dynamic_lighting != old_dynamic_lighting)
+		if (dynamic_lighting)
+			lighting_build_overlay()
+		else
+			lighting_clear_overlay()
+
+	if (config.starlight)
+		for (var/turf/space/S in RANGE_TURFS(1, src))
+			S.update_starlight()
+
+	W.above = old_above
 
 	if(ispath(N, /turf/simulated))
 		if(old_fire)
diff --git a/code/modules/lighting/lighting_turf.dm b/code/modules/lighting/lighting_turf.dm
index 1b0468b078f..c9881becaa5 100644
--- a/code/modules/lighting/lighting_turf.dm
+++ b/code/modules/lighting/lighting_turf.dm
@@ -195,41 +195,3 @@
 			continue
 
 		corners[i] = new/datum/lighting_corner(src, LIGHTING_CORNER_DIAGONAL[i])
-
-/turf/ChangeTurf(turf/N, tell_universe = TRUE, force_lighting_update = FALSE)
-	if (!SSlighting)
-		return ..()
-
-	var/old_opacity = opacity
-	var/old_dynamic_lighting = dynamic_lighting
-	var/list/old_affecting_lights = affecting_lights
-	var/old_lighting_overlay = lighting_overlay
-	var/list/old_corners = corners
-
-	. = ..()
-
-#ifndef AO_USE_LIGHTING_OPACITY
-	if (permit_ao)
-		regenerate_ao()
-#endif
-
-	recalc_atom_opacity()
-	lighting_overlay = old_lighting_overlay
-	if (lighting_overlay && lighting_overlay.loc != src)
-		// This is a hack, but I can't figure out why the fuck they're not on the correct turf in the first place.
-		lighting_overlay.forceMove(src, harderforce = TRUE)
-		
-	affecting_lights = old_affecting_lights
-	corners = old_corners
-
-	if ((old_opacity != opacity) || (dynamic_lighting != old_dynamic_lighting) || force_lighting_update)
-		reconsider_lights()
-
-	if (dynamic_lighting != old_dynamic_lighting)
-		if (dynamic_lighting)
-			lighting_build_overlay()
-		else
-			lighting_clear_overlay()
-
-	for (var/turf/space/S in RANGE_TURFS(1, src))
-		S.update_starlight()
diff --git a/code/modules/mining/mine_turf_types.dm b/code/modules/mining/mine_turf_types.dm
index 864c76868b7..527cb1f98e0 100644
--- a/code/modules/mining/mine_turf_types.dm
+++ b/code/modules/mining/mine_turf_types.dm
@@ -12,6 +12,7 @@
 			/turf/simulated/lava,
 			/turf/simulated/mineral
 	)
+	openspace_override_type = /turf/simulated/open/chasm/airless
 
 // Custom behavior here - we want smoothed turfs to show basalt underneath, not lava.
 /turf/simulated/lava/get_smooth_underlay_icon(mutable_appearance/underlay_appearance, turf/asking_turf, adjacency_dir)
@@ -34,6 +35,7 @@
 	light_color = LIGHT_COLOR_LAVA
 	smooth = SMOOTH_FALSE
 	canSmoothWith = null
+	openspace_override_type = /turf/simulated/open/chasm/airless
 
 	footstep_sound = "concretestep"
 
diff --git a/code/modules/multiz/structures.dm b/code/modules/multiz/structures.dm
index d3d51ed32f2..68a5bca1057 100644
--- a/code/modules/multiz/structures.dm
+++ b/code/modules/multiz/structures.dm
@@ -175,7 +175,7 @@
 			warning("Stair created without level above: ([loc.x], [loc.y], [loc.z])")
 			return qdel(src)
 		if(!istype(above))
-			above.ChangeTurf(/turf/simulated/open)
+			above.ChangeToOpenturf()
 
 /obj/structure/stairs/Uncross(atom/movable/A)
 	if(A.dir == dir && A.loc == loc)
diff --git a/icons/turf/smooth/rocky_ash.dmi b/icons/turf/smooth/rocky_ash.dmi
index 2a57edfc53a..3e2f72bc358 100644
Binary files a/icons/turf/smooth/rocky_ash.dmi and b/icons/turf/smooth/rocky_ash.dmi differ