Turns transparency for turfs into an element, and gives it to datum materials. (#54250)

_maps/RandomRuins/IceRuins/icemoon_surface_mining_site.dmm

@@ -16,7 +16,7 @@
 /turf/open/floor/wood,
 /area/ruin/unpowered)
 "d" = (
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/icemoon/surface/outdoors)
 "e" = (
 /obj/item/clothing/suit/hooded/explorer,

_maps/icebox.json

@@ -33,7 +33,7 @@
 			"Linkage": null,
 			"Gravity": true,
 			"Ice Ruins Underground": true,
-			"Baseturf": "/turf/open/transparent/openspace/icemoon"
+			"Baseturf": "/turf/open/openspace/icemoon"
 		},
 		{
 			"Down": -1,
@@ -42,7 +42,7 @@
 			"Gravity": true,
 			"Ice Ruins": true,
 			"Weather_Snowstorm": true,
-			"Baseturf": "/turf/open/transparent/openspace/icemoon"
+			"Baseturf": "/turf/open/openspace/icemoon"
 		}
 	],
 	"minetype": "none",

_maps/map_files/IceBoxStation/IceBoxStation.dmm

@@ -931,7 +931,7 @@
 /obj/machinery/light/small{
 	dir = 8
 	},
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/security/execution/transfer)
 "acb" = (
 /obj/effect/decal/cleanable/dirt,
@@ -1128,7 +1128,7 @@
 	id = "executionflash";
 	pixel_x = 25
 	},
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/security/execution/transfer)
 "acB" = (
 /obj/effect/turf_decal/stripes/end{
@@ -7525,7 +7525,7 @@
 /obj/structure/railing{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/quartermaster/storage)
 "aqv" = (
 /obj/machinery/door/airlock/external{
@@ -7869,7 +7869,7 @@
 /turf/open/floor/plasteel,
 /area/crew_quarters/fitness)
 "arm" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/quartermaster/storage)
 "arn" = (
 /obj/structure/closet/athletic_mixed,
@@ -8088,7 +8088,7 @@
 /obj/structure/railing{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/quartermaster/storage)
 "arR" = (
 /obj/machinery/atmospherics/pipe/simple/scrubbers/hidden/layer2,
@@ -10863,7 +10863,7 @@
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer4{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/quartermaster/storage)
 "ayj" = (
 /obj/structure/table,
@@ -17620,7 +17620,7 @@
 /obj/machinery/light{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aNO" = (
 /obj/machinery/light/small{
@@ -18029,7 +18029,7 @@
 /obj/machinery/camera{
 	c_tag = "Hydroponics North"
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aOS" = (
 /obj/structure/disposalpipe/segment,
@@ -18061,7 +18061,7 @@
 /area/hallway/secondary/entry)
 "aOZ" = (
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aPa" = (
 /obj/structure/disposalpipe/segment{
@@ -18132,7 +18132,7 @@
 /obj/machinery/light/small{
 	dir = 4
 	},
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/security/execution/transfer)
 "aPk" = (
 /turf/open/floor/plasteel/chapel{
@@ -20003,7 +20003,7 @@
 /turf/open/floor/plasteel,
 /area/security/prison)
 "aUi" = (
-/turf/open/transparent/glass,
+/turf/open/floor/glass,
 /area/hydroponics)
 "aUl" = (
 /obj/structure/chair/office{
@@ -20119,7 +20119,7 @@
 	pixel_x = 24
 	},
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aUA" = (
 /obj/structure/table/wood,
@@ -20604,16 +20604,16 @@
 /obj/structure/railing{
 	dir = 4
 	},
-/turf/open/transparent/glass,
+/turf/open/floor/glass,
 /area/hydroponics)
 "aVJ" = (
 /obj/machinery/light{
 	dir = 8
 	},
-/turf/open/transparent/glass,
+/turf/open/floor/glass,
 /area/hydroponics)
 "aVK" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aVL" = (
 /obj/structure/disposalpipe/sorting/mail/flip{
@@ -20628,7 +20628,7 @@
 	dir = 4
 	},
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aVN" = (
 /obj/structure/disposalpipe/segment{
@@ -20941,7 +20941,7 @@
 /turf/open/floor/plating,
 /area/maintenance/port)
 "aWA" = (
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/security/execution/transfer)
 "aWC" = (
 /obj/structure/cable,
@@ -21371,7 +21371,7 @@
 /obj/structure/railing{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "aXp" = (
 /obj/machinery/door/airlock{
@@ -21867,7 +21867,7 @@
 "aYy" = (
 /obj/structure/closet/l3closet/scientist,
 /obj/item/extinguisher,
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "aYz" = (
 /obj/structure/disposalpipe/segment{
@@ -27269,7 +27269,7 @@
 /turf/open/floor/plasteel,
 /area/security/checkpoint/medical)
 "blq" = (
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/icemoon/surface/outdoors)
 "blr" = (
 /obj/machinery/computer/card/minor/cmo,
@@ -36517,7 +36517,7 @@
 /obj/machinery/light{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "bJI" = (
 /obj/structure/disposalpipe/segment,
@@ -36805,7 +36805,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/icemoon/surface/outdoors)
 "bKL" = (
 /obj/structure/disposalpipe/segment{
@@ -36908,7 +36908,7 @@
 /obj/effect/turf_decal/stripes/line{
 	dir = 8
 	},
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "bLc" = (
 /obj/machinery/computer/security/telescreen{
@@ -38940,18 +38940,18 @@
 /turf/open/floor/plasteel,
 /area/security/checkpoint/engineering)
 "bRT" = (
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "bRY" = (
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "bSa" = (
 /obj/structure/lattice/catwalk,
 /obj/structure/railing{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "bSc" = (
 /obj/structure/table,
@@ -49391,7 +49391,7 @@
 /obj/structure/railing{
 	dir = 10
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "ekN" = (
 /obj/effect/turf_decal/tile/green,
@@ -49554,7 +49554,7 @@
 	dir = 8;
 	network = list("ss13","rd","xeno_pens")
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "feO" = (
 /obj/structure/disposalpipe/segment{
@@ -50201,7 +50201,7 @@
 /obj/structure/railing{
 	dir = 6
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "gWd" = (
 /obj/structure/cable,
@@ -50276,7 +50276,7 @@
 /area/crew_quarters/heads/captain)
 "heL" = (
 /obj/structure/closet/secure_closet/cytology,
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "hgK" = (
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer4{
@@ -50388,7 +50388,7 @@
 /obj/machinery/light{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "hFg" = (
 /obj/machinery/door/airlock/external{
@@ -50520,7 +50520,7 @@
 	id = "publicElevator"
 	},
 /obj/machinery/light/floor,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "ibG" = (
 /obj/machinery/nanite_programmer,
@@ -50927,7 +50927,7 @@
 /obj/structure/lattice/catwalk,
 /obj/structure/window/reinforced,
 /obj/structure/reagent_dispensers/watertank,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "jqx" = (
 /obj/structure/railing/corner{
@@ -51671,7 +51671,7 @@
 	pixel_y = -24
 	},
 /obj/machinery/light,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "kKU" = (
 /obj/effect/decal/cleanable/cobweb,
@@ -51977,7 +51977,7 @@
 /obj/structure/extinguisher_cabinet{
 	pixel_x = -27
 	},
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "lzt" = (
 /obj/item/soap/deluxe,
@@ -52148,7 +52148,7 @@
 /obj/structure/railing{
 	dir = 9
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "lTQ" = (
 /obj/vehicle/ridden/wheelchair{
@@ -52187,7 +52187,7 @@
 	dir = 1
 	},
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "lZG" = (
 /obj/effect/turf_decal/tile/blue,
@@ -52339,7 +52339,7 @@
 /obj/machinery/light{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hydroponics)
 "muM" = (
 /obj/structure/cable,
@@ -52675,11 +52675,11 @@
 /turf/open/floor/plating,
 /area/maintenance/starboard/aft)
 "nka" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "nlo" = (
 /obj/structure/industrial_lift,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "nlN" = (
 /obj/effect/turf_decal/tile/yellow,
@@ -52925,7 +52925,7 @@
 	c_tag = "Xenobiology Lab Entrance";
 	network = list("ss13","rd")
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "nLS" = (
 /obj/machinery/door/airlock/research{
@@ -53245,7 +53245,7 @@
 /obj/structure/railing{
 	dir = 5
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/storage/mining)
 "oHU" = (
 /obj/machinery/atmospherics/pipe/simple/general/visible{
@@ -53498,7 +53498,7 @@
 /obj/machinery/light{
 	dir = 1
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "pnD" = (
 /obj/structure/table/glass,
@@ -53651,7 +53651,7 @@
 	dir = 8;
 	network = list("ss13","rd","xeno_pens")
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "pBF" = (
 /obj/effect/turf_decal/trimline/blue/filled/line,
@@ -55273,7 +55273,7 @@
 	pixel_y = -22
 	},
 /obj/machinery/light,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "ulo" = (
 /obj/effect/turf_decal/delivery,
@@ -56283,7 +56283,7 @@
 /obj/machinery/firealarm{
 	pixel_y = 24
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "wUs" = (
 /obj/structure/closet/secure_closet/detective,
@@ -56560,7 +56560,7 @@
 /obj/structure/rack,
 /obj/item/storage/box/lights/tubes,
 /obj/item/crowbar/red,
-/turf/open/transparent/glass/reinforced,
+/turf/open/floor/glass/reinforced,
 /area/science/xenobiology)
 "xzN" = (
 /obj/machinery/door/airlock/external{
@@ -56592,7 +56592,7 @@
 /obj/machinery/light{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "xCR" = (
 /obj/effect/turf_decal/stripes/line{
@@ -56859,7 +56859,7 @@
 /obj/structure/railing{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 "ydc" = (
 /obj/structure/cable,
@@ -56957,7 +56957,7 @@
 	dir = 4;
 	network = list("ss13","rd","xeno_pens")
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/science/xenobiology)
 
 (1,1,1) = {"

_maps/map_files/IceBoxStation/IcemoonUnderground_Above.dmm

@@ -2699,7 +2699,7 @@
 /turf/open/floor/plasteel,
 /area/mine/living_quarters)
 "kw" = (
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/storage/mining)
 "ky" = (
 /obj/machinery/light/small{
@@ -5107,7 +5107,7 @@
 /turf/open/floor/plasteel/dark,
 /area/storage/mining)
 "Ma" = (
-/turf/open/transparent/openspace/icemoon,
+/turf/open/openspace/icemoon,
 /area/icemoon/underground/explored)
 "Mk" = (
 /obj/machinery/camera{

_maps/map_files/debug/multiz.dmm

@@ -103,7 +103,7 @@
 /turf/open/floor/plasteel,
 /area/engine/gravity_generator)
 "au" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/space)
 "av" = (
 /obj/structure/stairs/north,
@@ -1030,7 +1030,7 @@
 	},
 /area/hallway/secondary/service)
 "eC" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/maintenance/department/bridge)
 "eD" = (
 /obj/effect/turf_decal/stripes/asteroid/line{
@@ -1139,7 +1139,7 @@
 /area/engine/storage)
 "fp" = (
 /obj/structure/lattice/catwalk,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/engine/storage)
 "gK" = (
 /obj/machinery/atmospherics/components/unary/portables_connector/visible{
@@ -1198,7 +1198,7 @@
 /turf/open/floor/plating,
 /area/construction)
 "iu" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hallway/secondary/service)
 "iH" = (
 /obj/effect/turf_decal/stripes/white/line,
@@ -1294,7 +1294,7 @@
 	},
 /area/hallway/secondary/service)
 "nx" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/space/nearstation)
 "nz" = (
 /obj/machinery/light{
@@ -1346,10 +1346,10 @@
 /obj/machinery/light{
 	dir = 4
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/hallway/secondary/service)
 "qo" = (
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/engine/storage)
 "qx" = (
 /obj/structure/railing/corner{
@@ -1372,7 +1372,7 @@
 /obj/machinery/light{
 	dir = 8
 	},
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/engine/storage)
 "rN" = (
 /obj/machinery/atmospherics/pipe/manifold/supply/hidden{
@@ -1485,7 +1485,7 @@
 /area/storage/primary)
 "xO" = (
 /obj/structure/lattice,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/engine/storage)
 "yl" = (
 /obj/structure/cable,
@@ -1562,7 +1562,7 @@
 /area/construction)
 "Bk" = (
 /obj/structure/grille,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/space/nearstation)
 "Bm" = (
 /obj/machinery/light{
@@ -1754,7 +1754,7 @@
 "Ob" = (
 /obj/structure/lattice,
 /obj/structure/grille,
-/turf/open/transparent/openspace,
+/turf/open/openspace,
 /area/space/nearstation)
 "Og" = (
 /obj/machinery/airalarm/directional/north,

_maps/multiz_debug.json

@@ -11,12 +11,12 @@
 		{
 			"Up": 1,
 			"Down": -1,
-			"Baseturf": "/turf/open/transparent/openspace",
+			"Baseturf": "/turf/open/openspace",
 			"Linkage": "Cross"
 		},
 		{
 			"Down": -1,
-			"Baseturf": "/turf/open/transparent/openspace",
+			"Baseturf": "/turf/open/openspace",
 			"Linkage": "Cross"
 		}
 	]

code/__DEFINES/dcs/signals.dm

@@ -229,7 +229,9 @@
 #define COMSIG_TURF_CHANGE "turf_change"
 ///from base of atom/has_gravity(): (atom/asker, list/forced_gravities)
 #define COMSIG_TURF_HAS_GRAVITY "turf_has_gravity"
-///from base of turf/New(): (turf/source, direction)
+///from base of turf/multiz_turf_del(): (turf/source, direction)
+#define COMSIG_TURF_MULTIZ_DEL "turf_multiz_del"
+///from base of turf/multiz_turf_new: (turf/source, direction)
 #define COMSIG_TURF_MULTIZ_NEW "turf_multiz_new"
 
 // /atom/movable signals

code/__DEFINES/icon_smoothing.dm

@@ -41,7 +41,7 @@ DEFINE_BITFIELD(smoothing_flags, list(
 #define SMOOTH_GROUP_TURF_OPEN S_TURF(0)				///turf/open
 #define SMOOTH_GROUP_TURF_CHASM S_TURF(1)				///turf/open/chasm, /turf/open/floor/fakepit
 #define SMOOTH_GROUP_FLOOR_LAVA S_TURF(2)				///turf/open/lava/smooth
-#define SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS S_TURF(3)	///turf/open/transparent/glass
+#define SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS S_TURF(3)	///turf/open/floor/glass
 
 #define SMOOTH_GROUP_OPEN_FLOOR S_TURF(4)				///turf/open/floor
 

code/__DEFINES/is_helpers.dm

@@ -14,7 +14,7 @@ GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
 	/turf/open/chasm,
 	/turf/open/lava,
 	/turf/open/water,
-	/turf/open/transparent/openspace
+	/turf/open/openspace
 	)))
 
 #define isgroundlessturf(A) (is_type_in_typecache(A, GLOB.turfs_without_ground))
@@ -41,7 +41,7 @@ GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
 
 #define isplatingturf(A) (istype(A, /turf/open/floor/plating))
 
-#define istransparentturf(A) (istype(A, /turf/open/transparent))
+#define istransparentturf(A) (HAS_TRAIT(A, TURF_Z_TRANSPARENT_TRAIT))
 
 //Mobs
 #define isliving(A) (istype(A, /mob/living))

code/__DEFINES/traits.dm

@@ -354,6 +354,8 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 #define HANDCUFFED_TRAIT "handcuffed"
 /// Trait granted by [/obj/item/warpwhistle]
 #define WARPWHISTLE_TRAIT "warpwhistle"
+///Turf trait for when a turf is transparent
+#define TURF_Z_TRANSPARENT_TRAIT "turf_z_transparent"
 /// Trait applied by by [/datum/component/soulstoned]
 #define SOULSTONE_TRAIT "soulstone"
 /// Trait applied to slimes by low temperature

code/controllers/subsystem/mapping.dm

@@ -102,7 +102,7 @@ SUBSYSTEM_DEF(mapping)
 		// needs to be whitelisted for underground too so place_below ruins work
 		seedRuins(ice_ruins, CONFIG_GET(number/icemoon_budget), list(/area/icemoon/surface/outdoors/unexplored, /area/icemoon/underground/unexplored), ice_ruins_templates)
 		for (var/ice_z in ice_ruins)
-			spawn_rivers(ice_z, 4, /turf/open/transparent/openspace/icemoon, /area/icemoon/surface/outdoors/unexplored/rivers)
+			spawn_rivers(ice_z, 4, /turf/open/openspace/icemoon, /area/icemoon/surface/outdoors/unexplored/rivers)
 
 	var/list/ice_ruins_underground = levels_by_trait(ZTRAIT_ICE_RUINS_UNDERGROUND)
 	if (ice_ruins_underground.len)

code/datums/elements/turf_transparency.dm

@@ -0,0 +1,75 @@
+/datum/element/turf_z_transparency
+	var/show_bottom_level = FALSE
+
+///This proc sets up the signals to handle updating viscontents when turfs above/below update. Handle plane and layer here too so that they don't cover other obs/turfs in Dream Maker
+/datum/element/turf_z_transparency/Attach(datum/target, show_bottom_level = TRUE)
+	. = ..()
+	if(!isturf(target))
+		return ELEMENT_INCOMPATIBLE
+
+	var/turf/our_turf = target
+
+	src.show_bottom_level = show_bottom_level
+
+	our_turf.plane = OPENSPACE_PLANE
+	our_turf.layer = OPENSPACE_LAYER
+
+	RegisterSignal(target, COMSIG_TURF_MULTIZ_DEL, .proc/on_multiz_turf_del)
+	RegisterSignal(target, COMSIG_TURF_MULTIZ_NEW, .proc/on_multiz_turf_new)
+
+	ADD_TRAIT(our_turf, TURF_Z_TRANSPARENT_TRAIT, TURF_TRAIT)
+
+
+	update_multiz(our_turf, TRUE, TRUE)
+
+/datum/element/turf_z_transparency/Detach(datum/source, force)
+	. = ..()
+	var/turf/our_turf = source
+	our_turf.vis_contents.len = 0
+	REMOVE_TRAIT(our_turf, TURF_Z_TRANSPARENT_TRAIT, TURF_TRAIT)
+
+///Updates the viscontents or underlays below this tile.
+/datum/element/turf_z_transparency/proc/update_multiz(turf/our_turf, prune_on_fail = FALSE, init = FALSE)
+	var/turf/below_turf = our_turf.below()
+	if(!below_turf)
+		our_turf.vis_contents.len = 0
+		if(!show_bottom_level(our_turf) && prune_on_fail) //If we cant show whats below, and we prune on fail, change the turf to plating as a fallback
+			our_turf.ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
+			return FALSE
+	if(init)
+		our_turf.vis_contents += below_turf
+	if(isclosedturf(our_turf)) //Show girders below closed turfs
+		var/mutable_appearance/girder_underlay = mutable_appearance('icons/obj/structures.dmi', "girder", layer = TURF_LAYER-0.01)
+		girder_underlay.appearance_flags = RESET_ALPHA | RESET_COLOR
+		our_turf.underlays += girder_underlay
+		var/mutable_appearance/plating_underlay = mutable_appearance('icons/turf/floors.dmi', "plating", layer = TURF_LAYER-0.02)
+		plating_underlay = RESET_ALPHA | RESET_COLOR
+		our_turf.underlays += plating_underlay
+	return TRUE
+
+/datum/element/turf_z_transparency/proc/on_multiz_turf_del(turf/our_turf, turf/T, dir)
+	SIGNAL_HANDLER 
+	if(dir != DOWN)
+		return
+	update_multiz(our_turf)
+
+/datum/element/turf_z_transparency/proc/on_multiz_turf_new(turf/our_turf, turf/T, dir)
+	SIGNAL_HANDLER 
+	if(dir != DOWN)
+		return
+	update_multiz(our_turf)
+
+///Called when there is no real turf below this turf
+/datum/element/turf_z_transparency/proc/show_bottom_level(turf/our_turf)
+	if(!show_bottom_level)
+		return FALSE
+	var/turf/path = SSmapping.level_trait(our_turf.z, ZTRAIT_BASETURF) || /turf/open/space
+	if(!ispath(path))
+		path = text2path(path)
+		if(!ispath(path))
+			warning("Z-level [our_turf.z] has invalid baseturf '[SSmapping.level_trait(our_turf.z, ZTRAIT_BASETURF)]'")
+			path = /turf/open/space
+	var/mutable_appearance/underlay_appearance = mutable_appearance(initial(path.icon), initial(path.icon_state), layer = TURF_LAYER-0.02, plane = PLANE_SPACE)
+	underlay_appearance.appearance_flags = RESET_ALPHA | RESET_COLOR
+	our_turf.underlays += underlay_appearance
+	return TRUE

code/datums/materials/_material.dm

@@ -58,6 +58,8 @@ Simple datum which is instanced once per type and is used for every object of sa
 			ADD_KEEP_TOGETHER(source, MATERIAL_SOURCE(src))
 			source.filters += cached_texture_filter
 
+	if(alpha < 255)
+		source.opacity = FALSE
 	if(material_flags & MATERIAL_ADD_PREFIX)
 		source.name = "[name] [source.name]"
 
@@ -107,13 +109,14 @@ Simple datum which is instanced once per type and is used for every object of sa
 
 /datum/material/proc/on_applied_turf(turf/T, amount, material_flags)
 	if(isopenturf(T))
-		if(!turf_sound_override)
-			return
-		var/turf/open/O = T
-		O.footstep = turf_sound_override
-		O.barefootstep = turf_sound_override
-		O.clawfootstep = turf_sound_override
-		O.heavyfootstep = turf_sound_override
+		if(turf_sound_override)
+			var/turf/open/O = T
+			O.footstep = turf_sound_override
+			O.barefootstep = turf_sound_override
+			O.clawfootstep = turf_sound_override
+			O.heavyfootstep = turf_sound_override
+	if(alpha < 255)
+		T.AddElement(/datum/element/turf_z_transparency, TRUE)
 	return
 
 ///This proc is called when the material is removed from an object.
@@ -144,7 +147,8 @@ Simple datum which is instanced once per type and is used for every object of sa
 		o.throwforce = initial(o.throwforce)
 
 /datum/material/proc/on_removed_turf(turf/T, amount, material_flags)
-	return
+	if(alpha)
+		RemoveElement(/datum/element/turf_z_transparency, FALSE)
 
 /**
   *	This proc is called when the mat is found in an item that's consumed by accident. see /obj/item/proc/on_accidental_consumption.

code/game/atoms.dm

@@ -436,10 +436,6 @@
 					M.forceMove(src)
 		parts_list.Cut()
 
-///Hook for multiz???
-/atom/proc/update_multiz(prune_on_fail = FALSE)
-	return FALSE
-
 ///Take air from the passed in gas mixture datum
 /atom/proc/assume_air(datum/gas_mixture/giver)
 	qdel(giver)
@@ -1583,7 +1579,7 @@
 
 	if(isspaceturf(T)) // Turf never has gravity
 		return 0
-	if(istype(T, /turf/open/transparent/openspace)) //openspace in a space area doesn't get gravity
+	if(istype(T, /turf/open/openspace)) //openspace in a space area doesn't get gravity
 		if(istype(get_area(T), /area/space))
 			return 0
 

code/game/objects/structures/aliens.dm

@@ -141,7 +141,7 @@
 			/turf/open/space,
 			/turf/open/chasm,
 			/turf/open/lava,
-			/turf/open/transparent/openspace))
+			/turf/open/openspace))
 
 	set_base_icon()
 

code/game/objects/structures/industrial_lift.dm

@@ -118,7 +118,7 @@
 		var/turf/T = get_step_multiz(lift_platform, check_dir)
 		if(!T)//the edges of multi-z maps
 			return FALSE
-		if(check_dir == DOWN && !istype(get_turf(lift_platform), /turf/open/transparent/openspace))
+		if(check_dir == DOWN && !istype(get_turf(lift_platform), /turf/open/openspace))
 			return FALSE
 	return TRUE
 

code/game/objects/structures/stairs.dm

@@ -3,7 +3,7 @@
 #define STAIR_TERMINATOR_YES 2
 
 // dir determines the direction of travel to go upwards
-// stairs require /turf/open/transparent/openspace as the tile above them to work, unless your stairs have 'force_open_above' set to TRUE
+// stairs require /turf/open/openspace as the tile above them to work, unless your stairs have 'force_open_above' set to TRUE
 // multiple stair objects can be chained together; the Z level transition will happen on the final stair object in the chain
 
 /obj/structure/stairs
@@ -12,7 +12,7 @@
 	icon_state = "stairs"
 	anchored = TRUE
 
-	var/force_open_above = FALSE // replaces the turf above this stair obj with /turf/open/transparent/openspace
+	var/force_open_above = FALSE // replaces the turf above this stair obj with /turf/open/openspace
 	var/terminator_mode = STAIR_TERMINATOR_AUTOMATIC
 	var/turf/listeningTo
 
@@ -107,22 +107,22 @@
 /obj/structure/stairs/proc/build_signal_listener()
 	if(listeningTo)
 		UnregisterSignal(listeningTo, COMSIG_TURF_MULTIZ_NEW)
-	var/turf/open/transparent/openspace/T = get_step_multiz(get_turf(src), UP)
+	var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 	RegisterSignal(T, COMSIG_TURF_MULTIZ_NEW, .proc/on_multiz_new)
 	listeningTo = T
 
 /obj/structure/stairs/proc/force_open_above()
-	var/turf/open/transparent/openspace/T = get_step_multiz(get_turf(src), UP)
+	var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 	if(T && !istype(T))
-		T.ChangeTurf(/turf/open/transparent/openspace, flags = CHANGETURF_INHERIT_AIR)
+		T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/proc/on_multiz_new(turf/source, dir)
 	SIGNAL_HANDLER
 
 	if(dir == UP)
-		var/turf/open/transparent/openspace/T = get_step_multiz(get_turf(src), UP)
+		var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 		if(T && !istype(T))
-			T.ChangeTurf(/turf/open/transparent/openspace, flags = CHANGETURF_INHERIT_AIR)
+			T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/intercept_zImpact(atom/movable/AM, levels = 1)
 	. = ..()

code/game/sound.dm

@@ -40,14 +40,14 @@ falloff_distance - Distance at which falloff begins. Sound is at peak volume (in
 	if(!ignore_walls) //these sounds don't carry through walls
 		listeners = listeners & hearers(maxdistance,turf_source)
 
-		if(istransparentturf(above_turf))
+		if(above_turf && istransparentturf(above_turf))
 			listeners += hearers(maxdistance,above_turf)
 
 		if(below_turf && istransparentturf(turf_source))
 			listeners += hearers(maxdistance,below_turf)
 
 	else
-		if(istransparentturf(above_turf))
+		if(above_turf && istransparentturf(above_turf))
 			listeners += SSmobs.clients_by_zlevel[above_turf.z]
 
 		if(below_turf && istransparentturf(turf_source))

code/game/turfs/open/floor/plating/asteroid.dm

@@ -199,7 +199,7 @@ GLOBAL_LIST_INIT(megafauna_spawn_list, list(/mob/living/simple_animal/hostile/me
 	name = "snow"
 	desc = "Looks cold."
 	icon = 'icons/turf/snow.dmi'
-	baseturfs = /turf/open/transparent/openspace/icemoon
+	baseturfs = /turf/open/openspace/icemoon
 	icon_state = "snow"
 	icon_plating = "snow"
 	initial_gas_mix = ICEMOON_DEFAULT_ATMOS
@@ -466,7 +466,7 @@ GLOBAL_LIST_INIT(megafauna_spawn_list, list(/mob/living/simple_animal/hostile/me
 	return FALSE
 
 /turf/open/floor/plating/asteroid/snow/icemoon
-	baseturfs = /turf/open/transparent/openspace/icemoon
+	baseturfs = /turf/open/openspace/icemoon
 	initial_gas_mix = ICEMOON_DEFAULT_ATMOS
 	slowdown = 0
 

code/game/turfs/open/glass.dm

@@ -0,0 +1,31 @@
+/turf/open/floor/glass
+	name = "Glass floor"
+	desc = "Dont jump on it, or do, I'm not your mom."
+	icon = 'icons/turf/floors/glass.dmi'
+	icon_state = "glass-0"
+	base_icon_state = "glass"
+	baseturfs = /turf/open/openspace
+	intact = FALSE //this means wires go on top
+	smoothing_flags = SMOOTH_BITMASK
+	smoothing_groups = list(SMOOTH_GROUP_TURF_OPEN, SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS)
+	canSmoothWith = list(SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS)
+	footstep = FOOTSTEP_PLATING
+	barefootstep = FOOTSTEP_HARD_BAREFOOT
+	clawfootstep = FOOTSTEP_HARD_CLAW
+	heavyfootstep = FOOTSTEP_GENERIC_HEAVY
+
+/turf/open/floor/glass/Initialize()
+	icon_state = "" //Prevent the normal icon from appearing behind the smooth overlays
+	..()
+	return INITIALIZE_HINT_LATELOAD
+
+/turf/open/floor/glass/LateInitialize()
+	. = ..()
+	AddElement(/datum/element/turf_z_transparency, TRUE)
+
+/turf/open/floor/glass/reinforced
+	name = "Reinforced glass floor"
+	desc = "Do jump on it, it can take it."
+	icon = 'icons/turf/floors/reinf_glass.dmi'
+	icon_state = "reinf_glass-0"
+	base_icon_state = "reinf_glass"

code/game/turfs/open/openspace.dm

@@ -13,44 +13,42 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 	//I don't know why the others are aligned but I shall do the same.
 	vis_flags		= VIS_INHERIT_ID
 
-/turf/open/transparent/openspace
+/turf/open/openspace
 	name = "open space"
 	desc = "Watch your step!"
 	icon_state = "transparent"
-	baseturfs = /turf/open/transparent/openspace
+	baseturfs = /turf/open/openspace
 	CanAtmosPassVertical = ATMOS_PASS_YES
+	baseturfs = /turf/open/openspace
+	intact = FALSE //this means wires go on top
 	//mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	var/can_cover_up = TRUE
 	var/can_build_on = TRUE
 
-/turf/open/transparent/openspace/airless
+/turf/open/openspace/airless
 	initial_gas_mix = AIRLESS_ATMOS
 
-/turf/open/transparent/openspace/debug/update_multiz()
-	..()
-	return TRUE
-
-///No bottom level for openspace.
-/turf/open/transparent/openspace/show_bottom_level()
-	return FALSE
-
-/turf/open/transparent/openspace/Initialize() // handle plane and layer here so that they don't cover other obs/turfs in Dream Maker
+/turf/open/openspace/Initialize() // handle plane and layer here so that they don't cover other obs/turfs in Dream Maker
 	. = ..()
-
 	vis_contents += GLOB.openspace_backdrop_one_for_all //Special grey square for projecting backdrop darkness filter on it.
+	return INITIALIZE_HINT_LATELOAD
 
-/turf/open/transparent/openspace/can_have_cabling()
+/turf/open/openspace/LateInitialize()
+	. = ..()
+	AddElement(/datum/element/turf_z_transparency, FALSE)
+
+/turf/open/openspace/can_have_cabling()
 	if(locate(/obj/structure/lattice/catwalk, src))
 		return TRUE
 	return FALSE
 
-/turf/open/transparent/openspace/zAirIn()
+/turf/open/openspace/zAirIn()
 	return TRUE
 
-/turf/open/transparent/openspace/zAirOut()
+/turf/open/openspace/zAirOut()
 	return TRUE
 
-/turf/open/transparent/openspace/zPassIn(atom/movable/A, direction, turf/source)
+/turf/open/openspace/zPassIn(atom/movable/A, direction, turf/source)
 	if(direction == DOWN)
 		for(var/obj/O in contents)
 			if(O.obj_flags & BLOCK_Z_IN_DOWN)
@@ -63,7 +61,7 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 		return TRUE
 	return FALSE
 
-/turf/open/transparent/openspace/zPassOut(atom/movable/A, direction, turf/destination)
+/turf/open/openspace/zPassOut(atom/movable/A, direction, turf/destination)
 	if(A.anchored)
 		return FALSE
 	if(direction == DOWN)
@@ -78,13 +76,13 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 		return TRUE
 	return FALSE
 
-/turf/open/transparent/openspace/proc/CanCoverUp()
+/turf/open/openspace/proc/CanCoverUp()
 	return can_cover_up
 
-/turf/open/transparent/openspace/proc/CanBuildHere()
+/turf/open/openspace/proc/CanBuildHere()
 	return can_build_on
 
-/turf/open/transparent/openspace/attackby(obj/item/C, mob/user, params)
+/turf/open/openspace/attackby(obj/item/C, mob/user, params)
 	..()
 	if(!CanBuildHere())
 		return
@@ -127,7 +125,7 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 		else
 			to_chat(user, "<span class='warning'>The plating is going to need some support! Place metal rods first.</span>")
 
-/turf/open/transparent/openspace/rcd_vals(mob/user, obj/item/construction/rcd/the_rcd)
+/turf/open/openspace/rcd_vals(mob/user, obj/item/construction/rcd/the_rcd)
 	if(!CanBuildHere())
 		return FALSE
 
@@ -140,7 +138,7 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 				return list("mode" = RCD_FLOORWALL, "delay" = 0, "cost" = 3)
 	return FALSE
 
-/turf/open/transparent/openspace/rcd_act(mob/user, obj/item/construction/rcd/the_rcd, passed_mode)
+/turf/open/openspace/rcd_act(mob/user, obj/item/construction/rcd/the_rcd, passed_mode)
 	switch(passed_mode)
 		if(RCD_FLOORWALL)
 			to_chat(user, "<span class='notice'>You build a floor.</span>")
@@ -148,13 +146,13 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 			return TRUE
 	return FALSE
 
-/turf/open/transparent/openspace/icemoon
+/turf/open/openspace/icemoon
 	name = "ice chasm"
-	baseturfs = /turf/open/transparent/openspace/icemoon
+	baseturfs = /turf/open/openspace/icemoon
 	initial_gas_mix = ICEMOON_DEFAULT_ATMOS
 	var/replacement_turf = /turf/open/floor/plating/asteroid/snow/icemoon
 
-/turf/open/transparent/openspace/icemoon/Initialize()
+/turf/open/openspace/icemoon/Initialize()
 	. = ..()
 	var/turf/T = below()
 	if(T.flags_1 & NO_RUINS_1)
@@ -165,5 +163,5 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 	var/turf/closed/mineral/M = T
 	M.mineralAmt = 0
 	M.gets_drilled()
-	baseturfs = /turf/open/transparent/openspace/icemoon //This is to ensure that IF random turf generation produces a openturf, there won't be other turfs assigned other than openspace.
+	baseturfs = /turf/open/openspace/icemoon //This is to ensure that IF random turf generation produces a openturf, there won't be other turfs assigned other than openspace.
 

code/game/turfs/open/space/space.dm

@@ -63,6 +63,13 @@
 	if (opacity)
 		directional_opacity = ALL_CARDINALS
 
+	var/turf/T = SSmapping.get_turf_above(src)
+	if(T)
+		T.multiz_turf_new(src, DOWN)
+	T = SSmapping.get_turf_below(src)
+	if(T)
+		T.multiz_turf_new(src, UP)
+
 	ComponentInitialize()
 
 	return INITIALIZE_HINT_NORMAL

code/game/turfs/open/transparent.dm

@@ -1,77 +0,0 @@
-/turf/open/transparent
-	baseturfs = /turf/open/transparent/openspace
-	intact = FALSE //this means wires go on top
-
-/turf/open/transparent/Initialize() // handle plane and layer here so that they don't cover other obs/turfs in Dream Maker
-	. = ..()
-	plane = OPENSPACE_PLANE
-	layer = OPENSPACE_LAYER
-
-	return INITIALIZE_HINT_LATELOAD
-
-/turf/open/transparent/LateInitialize()
-	update_multiz(TRUE, TRUE)
-
-/turf/open/transparent/Destroy()
-	vis_contents.len = 0
-	return ..()
-
-/turf/open/transparent/update_multiz(prune_on_fail = FALSE, init = FALSE)
-	. = ..()
-	var/turf/T = below()
-	if(!T)
-		vis_contents.len = 0
-		if(!show_bottom_level() && prune_on_fail) //If we cant show whats below, and we prune on fail, change the turf to plating as a fallback
-			ChangeTurf(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
-		return FALSE
-	if(init)
-		vis_contents += T
-	return TRUE
-
-/turf/open/transparent/multiz_turf_del(turf/T, dir)
-	if(dir != DOWN)
-		return
-	update_multiz()
-
-/turf/open/transparent/multiz_turf_new(turf/T, dir)
-	if(dir != DOWN)
-		return
-	update_multiz()
-
-///Called when there is no real turf below this turf
-/turf/open/transparent/proc/show_bottom_level()
-	var/turf/path = SSmapping.level_trait(z, ZTRAIT_BASETURF) || /turf/open/space
-	if(!ispath(path))
-		path = text2path(path)
-		if(!ispath(path))
-			warning("Z-level [z] has invalid baseturf '[SSmapping.level_trait(z, ZTRAIT_BASETURF)]'")
-			path = /turf/open/space
-	var/mutable_appearance/underlay_appearance = mutable_appearance(initial(path.icon), initial(path.icon_state), layer = TURF_LAYER, plane = PLANE_SPACE)
-	underlays += underlay_appearance
-	return TRUE
-
-
-/turf/open/transparent/glass
-	name = "Glass floor"
-	desc = "Dont jump on it, or do, I'm not your mom."
-	icon = 'icons/turf/floors/glass.dmi'
-	icon_state = "glass-0"
-	base_icon_state = "glass"
-	smoothing_flags = SMOOTH_BITMASK
-	smoothing_groups = list(SMOOTH_GROUP_TURF_OPEN, SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS)
-	canSmoothWith = list(SMOOTH_GROUP_FLOOR_TRANSPARENT_GLASS)
-	footstep = FOOTSTEP_PLATING
-	barefootstep = FOOTSTEP_HARD_BAREFOOT
-	clawfootstep = FOOTSTEP_HARD_CLAW
-	heavyfootstep = FOOTSTEP_GENERIC_HEAVY
-
-/turf/open/transparent/glass/Initialize()
-	icon_state = "" //Prevent the normal icon from appearing behind the smooth overlays
-	return ..()
-
-/turf/open/transparent/glass/reinforced
-	name = "Reinforced glass floor"
-	desc = "Do jump on it, it can take it."
-	icon = 'icons/turf/floors/reinf_glass.dmi'
-	icon_state = "reinf_glass-0"
-	base_icon_state = "reinf_glass"

code/game/turfs/turf.dm

@@ -111,11 +111,10 @@ GLOBAL_LIST_EMPTY(station_turfs)
 	var/turf/T = SSmapping.get_turf_above(src)
 	if(T)
 		T.multiz_turf_new(src, DOWN)
-		SEND_SIGNAL(T, COMSIG_TURF_MULTIZ_NEW, src, DOWN)
 	T = SSmapping.get_turf_below(src)
 	if(T)
 		T.multiz_turf_new(src, UP)
-		SEND_SIGNAL(T, COMSIG_TURF_MULTIZ_NEW, src, UP)
+
 
 	if (opacity)
 		directional_opacity = ALL_CARDINALS
@@ -162,8 +161,10 @@ GLOBAL_LIST_EMPTY(station_turfs)
 	user.Move_Pulled(src)
 
 /turf/proc/multiz_turf_del(turf/T, dir)
+	SEND_SIGNAL(src, COMSIG_TURF_MULTIZ_DEL, T, dir)
 
 /turf/proc/multiz_turf_new(turf/T, dir)
+	SEND_SIGNAL(src, COMSIG_TURF_MULTIZ_NEW, T, dir)
 
 ///returns if the turf has something dense inside it. if exclude_mobs is true, skips dense mobs like fat yoshi.
 /turf/proc/is_blocked_turf(exclude_mobs)

code/modules/awaymissions/away_props.dm

@@ -78,7 +78,7 @@
 		toggle()
 
 /obj/structure/pitgrate/proc/update_openspace()
-	var/turf/open/transparent/openspace/T = get_turf(src)
+	var/turf/open/openspace/T = get_turf(src)
 	if(!istype(T))
 		return
 	//Simple way to keep plane conflicts away, could probably be upgraded to something less nuclear with 513

code/modules/photography/camera/camera.dm

@@ -183,7 +183,7 @@
 	var/clone_area = SSmapping.RequestBlockReservation(size_x * 2 + 1, size_y * 2 + 1)
 	for(var/turf/placeholder in block(locate(target_turf.x - size_x, target_turf.y - size_y, target_turf.z), locate(target_turf.x + size_x, target_turf.y + size_y, target_turf.z)))
 		var/turf/T = placeholder
-		while(istype(T, /turf/open/transparent/openspace)) //Multi-z photography
+		while(istype(T, /turf/open/openspace)) //Multi-z photography
 			T = SSmapping.get_turf_below(T)
 			if(!T)
 				break

tgstation.dme

@@ -587,6 +587,7 @@
 #include "code\datums\elements\squish.dm"
 #include "code\datums\elements\swabbable.dm"
 #include "code\datums\elements\tool_flash.dm"
+#include "code\datums\elements\turf_transparency.dm"
 #include "code\datums\elements\undertile.dm"
 #include "code\datums\elements\update_icon_blocker.dm"
 #include "code\datums\elements\update_icon_updates_onmob.dm"
@@ -1313,10 +1314,10 @@
 #include "code\game\turfs\open\chasm.dm"
 #include "code\game\turfs\open\dirtystation.dm"
 #include "code\game\turfs\open\floor.dm"
+#include "code\game\turfs\open\glass.dm"
 #include "code\game\turfs\open\lava.dm"
 #include "code\game\turfs\open\openspace.dm"
 #include "code\game\turfs\open\river.dm"
-#include "code\game\turfs\open\transparent.dm"
 #include "code\game\turfs\open\water.dm"
 #include "code\game\turfs\open\floor\fancy_floor.dm"
 #include "code\game\turfs\open\floor\hull.dm"