Fixes layering issues brought by the FoV PR. (#63903)

* Fixed most (not all) incorrect planes and layers detected by the unit test.

code/game/objects/effects/temporary_visuals/cult.dm

@@ -35,6 +35,7 @@
 	name = "unholy glow"
 	icon_state = "doorglow"
 	layer = CLOSED_FIREDOOR_LAYER //above closed doors
+	plane = GAME_PLANE
 
 /obj/effect/temp_visual/cult/door/unruned
 	icon_state = "unruneddoorglow"
@@ -43,6 +44,7 @@
 	name = "unholy glow"
 	icon_state = "wallglow"
 	layer = ABOVE_NORMAL_TURF_LAYER
+	plane = GAME_PLANE
 
 /obj/effect/temp_visual/cult/turf/floor
 	icon_state = "floorglow"
@@ -53,6 +55,7 @@
 	icon_state = "space"
 	duration = 600
 	layer = ABOVE_OBJ_LAYER
+	plane = GAME_PLANE
 
 //visuals for runes being magically created
 /obj/effect/temp_visual/cult/rune_spawn

code/game/objects/effects/temporary_visuals/miscellaneous.dm

@@ -4,6 +4,7 @@
 	duration = 5
 	randomdir = FALSE
 	layer = BELOW_MOB_LAYER
+	plane = GAME_PLANE
 	var/splatter_type = "splatter"
 
 /obj/effect/temp_visual/dir_setting/bloodsplatter/Initialize(mapload, set_dir)
@@ -20,6 +21,7 @@
 		if(SOUTH)
 			target_pixel_y = -16
 			layer = ABOVE_MOB_LAYER
+			plane = GAME_PLANE_UPPER
 		if(EAST)
 			target_pixel_x = 16
 		if(WEST)
@@ -34,10 +36,12 @@
 			target_pixel_x = 16
 			target_pixel_y = -16
 			layer = ABOVE_MOB_LAYER
+			plane = GAME_PLANE_UPPER
 		if(SOUTHWEST)
 			target_pixel_x = -16
 			target_pixel_y = -16
 			layer = ABOVE_MOB_LAYER
+			plane = GAME_PLANE_UPPER
 	animate(src, pixel_x = target_pixel_x, pixel_y = target_pixel_y, alpha = 0, time = duration)
 
 /obj/effect/temp_visual/dir_setting/bloodsplatter/xenosplatter
@@ -47,6 +51,7 @@
 	name = "speedbike trails"
 	icon_state = "ion_fade"
 	layer = BELOW_MOB_LAYER
+	plane = GAME_PLANE
 	duration = 10
 	randomdir = 0
 
@@ -136,7 +141,8 @@
 
 /obj/effect/temp_visual/dir_setting/curse/grasp_portal
 	icon = 'icons/effects/64x64.dmi'
-	layer = LARGE_MOB_LAYER
+	layer = ABOVE_ALL_MOB_LAYER
+	plane = ABOVE_GAME_PLANE
 	pixel_y = -16
 	pixel_x = -16
 	duration = 32
@@ -156,6 +162,7 @@
 	icon = 'icons/effects/beam_splash.dmi'
 	icon_state = "beam_splash_l"
 	layer = ABOVE_ALL_MOB_LAYER
+	plane = ABOVE_GAME_PLANE
 	pixel_y = -16
 	duration = 50
 
@@ -315,6 +322,7 @@
 	icon = 'icons/obj/guns/projectiles.dmi'
 	icon_state = "kinetic_blast"
 	layer = ABOVE_ALL_MOB_LAYER
+	plane = ABOVE_GAME_PLANE
 	duration = 4
 
 /obj/effect/temp_visual/explosion
@@ -480,6 +488,7 @@
 	icon = 'icons/effects/effects_rcd.dmi'
 	icon_state = ""
 	layer = ABOVE_ALL_MOB_LAYER
+	plane = ABOVE_GAME_PLANE
 	anchored = TRUE
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	var/status = 0

code/game/objects/effects/temporary_visuals/projectiles/projectile_effects.dm

@@ -2,7 +2,7 @@
 	name = "pew"
 	icon = 'icons/obj/guns/projectiles.dmi'
 	icon_state = "nothing"
-	layer = ABOVE_MOB_LAYER
+	layer = HITSCAN_PROJECTILE_LAYER
 	plane = GAME_PLANE_FOV_HIDDEN
 	anchored = TRUE
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT

code/game/objects/effects/temporary_visuals/temporary_visual.dm

@@ -3,6 +3,7 @@
 	icon_state = "nothing"
 	anchored = TRUE
 	layer = ABOVE_MOB_LAYER
+	plane = GAME_PLANE_UPPER
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	///time, in deciseconds, that this object will exist
 	var/duration = 10