ports /tg/station vis_flags related fixes (#12064)

* fixes

* Update layers_planes.dm

* kay

code/game/atoms_movable.dm

@@ -68,7 +68,7 @@
 			if(vs.plane == EMISSIVE_BLOCKER_PLANE)
 				SSvis_overlays.remove_vis_overlay(src, list(vs))
 				break
-	SSvis_overlays.add_vis_overlay(src, icon, icon_state, EMISSIVE_BLOCKER_LAYER, EMISSIVE_BLOCKER_PLANE)
+	SSvis_overlays.add_vis_overlay(src, icon, icon_state, EMISSIVE_BLOCKER_LAYER, EMISSIVE_BLOCKER_PLANE, dir)
 
 /atom/movable/proc/can_zFall(turf/source, levels = 1, turf/target, direction)
 	if(!direction)

code/game/objects/effects/effects.dm

@@ -7,7 +7,7 @@
 	move_resist = INFINITY
 	obj_flags = 0
 
-	vis_flags = NONE
+	vis_flags = VIS_INHERIT_PLANE
 
 /obj/effect/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
 	return

code/game/objects/effects/overlays.dm

@@ -49,5 +49,6 @@
 /obj/effect/overlay/vis
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	anchored = TRUE
+	vis_flags = NONE
 	var/unused = 0 //When detected to be unused it gets set to world.time, after a while it gets removed
 	var/cache_expiration = 2 MINUTES // overlays which go unused for 2 minutes get cleaned up

code/game/objects/objs.dm

@@ -3,6 +3,7 @@
 	var/crit_fail = FALSE
 	animate_movement = 2
 	speech_span = SPAN_ROBOT
+	vis_flags = VIS_INHERIT_PLANE //when this be added to vis_contents of something it inherit something.plane, important for visualisation of obj in openspace.
 	var/obj_flags = CAN_BE_HIT
 	var/set_obj_flags // ONLY FOR MAPPING: Sets flags from a string list, handled in Initialize. Usage: set_obj_flags = "EMAGGED;!CAN_BE_HIT" to set EMAGGED and clear CAN_BE_HIT.
 

code/game/turfs/openspace/openspace.dm

@@ -1,7 +1,20 @@
+GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdrop, new)
+
+/atom/movable/openspace_backdrop
+	name			= "openspace_backdrop"
+
+	anchored		= TRUE
+
+	icon            = 'icons/turf/floors.dmi'
+	icon_state      = "grey"
+	plane           = OPENSPACE_BACKDROP_PLANE
+	mouse_opacity 	= MOUSE_OPACITY_TRANSPARENT
+	layer           = SPLASHSCREEN_LAYER
+
 /turf/open/openspace
 	name = "open space"
 	desc = "Watch your step!"
-	icon_state = "grey"
+	icon_state = "transparent"
 	baseturfs = /turf/open/openspace
 	CanAtmosPassVertical = ATMOS_PASS_YES
 	//mouse_opacity = MOUSE_OPACITY_TRANSPARENT
@@ -14,8 +27,9 @@
 
 /turf/open/openspace/Initialize() // handle plane and layer here so that they don't cover other obs/turfs in Dream Maker
 	. = ..()
-	plane = FLOOR_OPENSPACE_PLANE
+	plane = OPENSPACE_PLANE
 	layer = OPENSPACE_LAYER
+	vis_contents += GLOB.openspace_backdrop_one_for_all //Special grey square for projecting backdrop darkness filter on it.
 	return INITIALIZE_HINT_LATELOAD
 
 /turf/open/openspace/LateInitialize()

code/game/turfs/turf.dm

@@ -1,6 +1,8 @@
 /turf
 	icon = 'icons/turf/floors.dmi'
 	level = 1
+	vis_flags = VIS_INHERIT_PLANE|VIS_INHERIT_ID	//when this be added to vis_contents of something it inherit something.plane and be associatet with something on clicking,
+													//important for visualisation of turf in openspace and interraction with openspace that show you turf.
 
 	var/intact = 1