diff --git a/code/controllers/subsystem/mapping.dm b/code/controllers/subsystem/mapping.dm
index e99b5ad917ee..8dda5ee79930 100644
--- a/code/controllers/subsystem/mapping.dm
+++ b/code/controllers/subsystem/mapping.dm
@@ -157,12 +157,12 @@ SUBSYSTEM_DEF(mapping)
 			continue
 		parsed_maps[pm] = total_z  // save the start Z of this file
 		total_z += bounds[MAP_MAXZ] - bounds[MAP_MINZ] + 1
-
+	// multiz compatibility required
 	if (!length(traits))  // null or empty - default
 		for (var/i in 1 to total_z)
 			traits += list(default_traits)
 	else if (total_z != length(traits))  // mismatch
-		INIT_ANNOUNCE("WARNING: [length(traits)] trait sets specified for [total_z] z-levels in [path]!")
+		log_debug("[length(traits)] trait sets specified for [total_z] z-levels in [path]!")
 		if (total_z < length(traits))  // ignore extra traits
 			traits.Cut(total_z + 1)
 		while (total_z > length(traits))  // fall back to defaults on extra levels
diff --git a/code/game/turfs/open_space.dm b/code/game/turfs/open_space.dm
index d9d4be4a488a..08abb10b75d8 100644
--- a/code/game/turfs/open_space.dm
+++ b/code/game/turfs/open_space.dm
@@ -114,3 +114,7 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 
 	movable.forceMove(below)
 	movable.onZImpact(below, height)
+
+/turf/open_space/solid
+	baseturfs = /turf/open_space/solid
+	density = TRUE
diff --git a/maps/map_files/USS_Almayer/USS_Almayer.dmm b/maps/map_files/USS_Almayer/USS_Almayer.dmm
index ae1d91806511..fd2e02e9e1cb 100644
--- a/maps/map_files/USS_Almayer/USS_Almayer.dmm
+++ b/maps/map_files/USS_Almayer/USS_Almayer.dmm
@@ -21397,7 +21397,7 @@
 /turf/open/floor/plating/plating_catwalk/no_build,
 /area/almayer/middeck/hanger)
 "bcf" = (
-/turf/solid_open_space,
+/turf/open_space/solid,
 /area/almayer/middeck/hanger)
 "bcg" = (
 /obj/effect/decal/warning_stripes{
@@ -32729,25 +32729,25 @@
 /area/almayer/middeck/maintenance/paft)
 "bAW" = (
 /obj/effect/attach_point/weapon/dropship1/left_fore,
-/turf/solid_open_space,
+/turf/open_space/solid,
 /area/almayer/middeck/hanger)
 "bAX" = (
 /obj/effect/attach_point/electronics/dropship1{
 	dir = 1;
 	attach_id = 5
 	},
-/turf/solid_open_space,
+/turf/open_space/solid,
 /area/almayer/middeck/hanger)
 "bAY" = (
 /obj/effect/attach_point/electronics/dropship1{
 	dir = 1;
 	attach_id = 6
 	},
-/turf/solid_open_space,
+/turf/open_space/solid,
 /area/almayer/middeck/hanger)
 "bAZ" = (
 /obj/effect/attach_point/weapon/dropship1/right_fore,
-/turf/solid_open_space,
+/turf/open_space/solid,
 /area/almayer/middeck/hanger)
 "bBa" = (
 /obj/effect/decal/cleanable/dirt,