[MIRROR] Removes overlay queuing, saves 6/7 seconds of initialize. Lightly modifies stat tracking macros [MDB IGNORE] (#16449)

* Removes overlay queuing, saves 6/7 seconds of initialize. Lightly modifies stat tracking macros

* merge conflict

* other changes

Co-authored-by: LemonInTheDark <58055496+LemonInTheDark@users.noreply.github.com>
Co-authored-by: tastyfish <crazychris32@gmail.com>

code/__DEFINES/flags.dm

@@ -24,42 +24,40 @@ GLOBAL_LIST_INIT(bitflags, list(1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 204
 #define CONDUCT_1 (1<<1)
 /// For machines and structures that should not break into parts, eg, holodeck stuff
 #define NODECONSTRUCT_1 (1<<2)
-/// atom queued to SSoverlay
-#define OVERLAY_QUEUED_1 (1<<3)
 /// item has priority to check when entering or leaving
-#define ON_BORDER_1 (1<<4)
+#define ON_BORDER_1 (1<<3)
 ///Whether or not this atom shows screentips when hovered over
-#define NO_SCREENTIPS_1 (1<<5)
+#define NO_SCREENTIPS_1 (1<<4)
 /// Prevent clicking things below it on the same turf eg. doors/ fulltile windows
-#define PREVENT_CLICK_UNDER_1 (1<<6)
+#define PREVENT_CLICK_UNDER_1 (1<<5)
 ///specifies that this atom is a hologram that isnt real
-#define HOLOGRAM_1 (1<<7)
+#define HOLOGRAM_1 (1<<6)
 ///Whether /atom/Initialize() has already run for the object
-#define INITIALIZED_1 (1<<8)
+#define INITIALIZED_1 (1<<7)
 /// was this spawned by an admin? used for stat tracking stuff.
-#define ADMIN_SPAWNED_1 (1<<9)
+#define ADMIN_SPAWNED_1 (1<<8)
 /// should not get harmed if this gets caught by an explosion?
-#define PREVENT_CONTENTS_EXPLOSION_1 (1<<10)
+#define PREVENT_CONTENTS_EXPLOSION_1 (1<<9)
 /// Should this object be paintable with very dark colors?
-#define ALLOW_DARK_PAINTS_1 (1<<11)
+#define ALLOW_DARK_PAINTS_1 (1<<10)
 /// Should this object be unpaintable?
-#define UNPAINTABLE_1 (1<<12)
+#define UNPAINTABLE_1 (1<<11)
 /// Is the thing currently spinning?
-#define IS_SPINNING_1 (1<<13)
+#define IS_SPINNING_1 (1<<12)
 /// Is this atom on top of another atom, and as such has click priority?
-#define IS_ONTOP_1 (1<<14)
+#define IS_ONTOP_1 (1<<13)
 /// Is this atom immune to being dusted by the supermatter?
-#define SUPERMATTER_IGNORES_1 (1<<15)
+#define SUPERMATTER_IGNORES_1 (1<<14)
 /// If a turf can be made dirty at roundstart. This is also used in areas.
-#define CAN_BE_DIRTY_1 (1<<16)
+#define CAN_BE_DIRTY_1 (1<<15)
 /// Should we use the initial icon for display? Mostly used by overlay only objects
-#define HTML_USE_INITAL_ICON_1 (1<<17)
+#define HTML_USE_INITAL_ICON_1 (1<<16)
 /// Can players recolor this in-game via vendors (and maybe more if support is added)?
-#define IS_PLAYER_COLORABLE_1 (1<<18)
+#define IS_PLAYER_COLORABLE_1 (1<<17)
 /// Whether or not this atom has contextual screentips when hovered OVER
-#define HAS_CONTEXTUAL_SCREENTIPS_1 (1<<19)
+#define HAS_CONTEXTUAL_SCREENTIPS_1 (1<<18)
 // Whether or not this atom is storing contents for a disassociated storage object
-#define HAS_DISASSOCIATED_STORAGE_1 (1<<20)
+#define HAS_DISASSOCIATED_STORAGE_1 (1<<19)
 
 // Update flags for [/atom/proc/update_appearance]
 /// Update the atom's name

code/__DEFINES/stat_tracking.dm

@@ -8,12 +8,11 @@
 #define STAT_LOG_ENTRY(entrylist, entryname) \
 	var/list/STAT_ENTRY = entrylist[entryname] || (entrylist[entryname] = new /list(STAT_ENTRY_LENGTH));\
 	STAT_ENTRY[STAT_ENTRY_TIME] += STAT_TIME;\
-	var/STAT_INCR_AMOUNT = min(1, 2**round((STAT_ENTRY[STAT_ENTRY_COUNT] || 0)/SHORT_REAL_LIMIT));\
+	STAT_ENTRY[STAT_ENTRY_COUNT] += 1;
-	if (STAT_INCR_AMOUNT == 1 || prob(100/STAT_INCR_AMOUNT)) {\
-		STAT_ENTRY[STAT_ENTRY_COUNT] += STAT_INCR_AMOUNT;\
-	};\
 
 // Cost tracking macros, to be used in one proc
+// The static lists are under the assumption that costs and counting are global lists, and will therefor
+// Break during world init
 #define INIT_COST(costs, counting) \
 	var/list/_costs = costs; \
 	var/list/_counting = counting; \

code/__DEFINES/subsystems.dm

@@ -258,28 +258,22 @@
 
 //! ## Overlays subsystem
 
-///Compile all the overlays for an atom from the cache lists
+#define POST_OVERLAY_CHANGE(changed_on) \
-// |= on overlays is not actually guaranteed to not add same appearances but we're optimistically using it anyway.
+	if(length(changed_on.overlays) >= MAX_ATOM_OVERLAYS) { \
-#define COMPILE_OVERLAYS(A)\
+		var/text_lays = overlays2text(changed_on.overlays); \
-	do {\
+		stack_trace("Too many overlays on [changed_on.type] - [length(changed_on.overlays)], refusing to update and cutting.\
-		var/list/ad = A.add_overlays;\
+			\n What follows is a printout of all existing overlays at the time of the overflow \n[text_lays]"); \
-		var/list/rm = A.remove_overlays;\
+		changed_on.overlays.Cut(); \
-		if(LAZYLEN(rm)){\
+		changed_on.add_overlay(mutable_appearance('icons/testing/greyscale_error.dmi')); \
-			A.overlays -= rm;\
+	} \
-			rm.Cut();\
+	if(alternate_appearances) { \
-		}\
+		for(var/I in changed_on.alternate_appearances){\
-		if(LAZYLEN(ad)){\
+			var/datum/atom_hud/alternate_appearance/AA = changed_on.alternate_appearances[I];\
-			A.overlays |= ad;\
-			ad.Cut();\
-		}\
-		for(var/I in A.alternate_appearances){\
-			var/datum/atom_hud/alternate_appearance/AA = A.alternate_appearances[I];\
 			if(AA.transfer_overlays){\
-				AA.copy_overlays(A, TRUE);\
+				AA.copy_overlays(changed_on, TRUE);\
 			}\
-		}\
+		} \
-		A.flags_1 &= ~OVERLAY_QUEUED_1;\
+	}
-	} while (FALSE)
 
 /**
 	Create a new timer and add it to the queue.

code/__HELPERS/icons.dm

@@ -1024,7 +1024,6 @@ GLOBAL_LIST_EMPTY(friendly_animal_types)
 		body.equip_outfit_and_loadout(outfit, prefs, TRUE) //SKYRAT EDIT CHANGE
 
 	var/icon/out_icon = icon('icons/effects/effects.dmi', "nothing")
-	COMPILE_OVERLAYS(body)
 	for(var/D in showDirs)
 		var/icon/partial = getFlatIcon(body, defdir=D)
 		out_icon.Insert(partial,dir=D)
@@ -1054,7 +1053,6 @@ GLOBAL_LIST_EMPTY(friendly_animal_types)
 	var/initial_human_dir = existing_human.dir
 	existing_human.dir = SOUTH
 	var/icon/out_icon = icon('icons/effects/effects.dmi', "nothing")
-	COMPILE_OVERLAYS(existing_human)
 	for(var/direction in directions_to_output)
 		var/icon/partial = getFlatIcon(existing_human, defdir = direction)
 		out_icon.Insert(partial, dir = direction)

code/_globalvars/bitfields.dm

@@ -126,7 +126,6 @@ DEFINE_BITFIELD(flags_1, list(
 	"NODECONSTRUCT_1" = NODECONSTRUCT_1,
 	"NO_SCREENTIPS_1" = NO_SCREENTIPS_1,
 	"ON_BORDER_1" = ON_BORDER_1,
-	"OVERLAY_QUEUED_1" = OVERLAY_QUEUED_1,
 	"PREVENT_CLICK_UNDER_1" = PREVENT_CLICK_UNDER_1,
 	"PREVENT_CONTENTS_EXPLOSION_1" = PREVENT_CONTENTS_EXPLOSION_1,
 	"SUPERMATTER_IGNORES_1" = SUPERMATTER_IGNORES_1,

code/controllers/subsystem/overlays.dm

@@ -1,71 +1,16 @@
 SUBSYSTEM_DEF(overlays)
 	name = "Overlay"
-	flags = SS_TICKER
+	flags = SS_NO_FIRE|SS_NO_INIT
-	wait = 1
-	priority = FIRE_PRIORITY_OVERLAYS
-	init_order = INIT_ORDER_OVERLAY
-
-	var/list/queue
 	var/list/stats
 
 /datum/controller/subsystem/overlays/PreInit()
-	queue = list()
 	stats = list()
 
-/datum/controller/subsystem/overlays/Initialize()
-	initialized = TRUE
-	fire(mc_check = FALSE)
-	return SS_INIT_SUCCESS
-
-
-/datum/controller/subsystem/overlays/stat_entry(msg)
-	msg = "Ov:[length(queue)]"
-	return ..()
-
-
 /datum/controller/subsystem/overlays/Shutdown()
 	text2file(render_stats(stats), "[GLOB.log_directory]/overlay.log")
 
-
 /datum/controller/subsystem/overlays/Recover()
-	queue = SSoverlays.queue
+	stats = SSoverlays.stats
-
-
-/datum/controller/subsystem/overlays/fire(resumed = FALSE, mc_check = TRUE)
-	var/list/queue = src.queue
-	var/static/count = 0
-	if (count)
-		var/c = count
-		count = 0 //so if we runtime on the Cut, we don't try again.
-		queue.Cut(1,c+1)
-
-	for (var/atom/atom_to_compile as anything in queue)
-		count++
-		if(!atom_to_compile)
-			continue
-		STAT_START_STOPWATCH
-		COMPILE_OVERLAYS(atom_to_compile)
-		UNSETEMPTY(atom_to_compile.add_overlays)
-		UNSETEMPTY(atom_to_compile.remove_overlays)
-		STAT_STOP_STOPWATCH
-		STAT_LOG_ENTRY(stats, atom_to_compile.type)
-		if(length(atom_to_compile.overlays) >= MAX_ATOM_OVERLAYS)
-			//Break it real GOOD
-			var/text_lays = overlays2text(atom_to_compile.overlays)
-			stack_trace("Too many overlays on [atom_to_compile.type] - [length(atom_to_compile.overlays)], refusing to update and cutting.\
-				\n What follows is a printout of all existing overlays at the time of the overflow \n[text_lays]")
-			atom_to_compile.overlays.Cut()
-			//Let them know they fucked up
-			atom_to_compile.add_overlay(mutable_appearance('icons/testing/greyscale_error.dmi'))
-			continue
-		if(mc_check)
-			if(MC_TICK_CHECK)
-				break
-		else
-			CHECK_TICK
-	if (count)
-		queue.Cut(1,count+1)
-		count = 0
 
 /// Converts an overlay list into text for debug printing
 /// Of note: overlays aren't actually mutable appearances, they're just appearances
@@ -92,13 +37,12 @@ SUBSYSTEM_DEF(overlays)
 	iconbro.icon = icon
 	return iconbro.appearance
 
-/atom/proc/build_appearance_list(old_overlays)
+/atom/proc/build_appearance_list(build_overlays)
-	var/static/image/appearance_bro = new()
+	if (!islist(build_overlays))
-	var/list/new_overlays = list()
+		build_overlays = list(build_overlays)
-	if (!islist(old_overlays))
+	for (var/overlay in build_overlays)
-		old_overlays = list(old_overlays)
-	for (var/overlay in old_overlays)
 		if(!overlay)
+			build_overlays -= overlay
 			continue
 		if (istext(overlay))
 #ifdef UNIT_TESTS
@@ -109,64 +53,37 @@ SUBSYSTEM_DEF(overlays)
 				stack_trace("Invalid overlay: Icon object '[icon_file]' [REF(icon)] used in '[src]' [type] is missing icon state [overlay].")
 				continue
 #endif
-			new_overlays += iconstate2appearance(icon, overlay)
+			build_overlays -= overlay
+			build_overlays += iconstate2appearance(icon, overlay)
 		else if(isicon(overlay))
-			new_overlays += icon2appearance(overlay)
+			build_overlays -= overlay
-		else
+			build_overlays += icon2appearance(overlay)
-			if(isloc(overlay))
+	return build_overlays
-				var/atom/A = overlay
-				if (A.flags_1 & OVERLAY_QUEUED_1)
-					COMPILE_OVERLAYS(A)
-			appearance_bro.appearance = overlay //this works for images and atoms too!
-			if(!ispath(overlay))
-				var/image/I = overlay
-				appearance_bro.dir = I.dir
-			new_overlays += appearance_bro.appearance
-	return new_overlays
 
-#define NOT_QUEUED_ALREADY (!(flags_1 & OVERLAY_QUEUED_1))
-#define QUEUE_FOR_COMPILE flags_1 |= OVERLAY_QUEUED_1; SSoverlays.queue += src;
 /atom/proc/cut_overlays()
-	LAZYINITLIST(remove_overlays)
+	STAT_START_STOPWATCH
-	remove_overlays = overlays.Copy()
+	overlays = null
-	add_overlays = null
+	POST_OVERLAY_CHANGE(src)
+	STAT_STOP_STOPWATCH
+	STAT_LOG_ENTRY(SSoverlays.stats, type)
 
-	//If not already queued for work and there are overlays to remove
+/atom/proc/cut_overlay(list/remove_overlays)
-	if(NOT_QUEUED_ALREADY && remove_overlays.len)
-		QUEUE_FOR_COMPILE
-
-/atom/proc/cut_overlay(list/overlays)
 	if(!overlays)
 		return
-	overlays = build_appearance_list(overlays)
+	STAT_START_STOPWATCH
-	LAZYINITLIST(add_overlays)
+	overlays -= build_appearance_list(remove_overlays)
-	LAZYINITLIST(remove_overlays)
+	POST_OVERLAY_CHANGE(src)
-	var/a_len = add_overlays.len
+	STAT_STOP_STOPWATCH
-	var/r_len = remove_overlays.len
+	STAT_LOG_ENTRY(SSoverlays.stats, type)
-	remove_overlays += overlays
-	add_overlays -= overlays
 
-	var/fa_len = add_overlays.len
+/atom/proc/add_overlay(list/add_overlays)
-	var/fr_len = remove_overlays.len
-
-	//If not already queued and there is work to be done
-	if(NOT_QUEUED_ALREADY && (fa_len != a_len || fr_len != r_len ))
-		QUEUE_FOR_COMPILE
-	UNSETEMPTY(add_overlays)
-
-/atom/proc/add_overlay(list/overlays)
 	if(!overlays)
 		return
-
+	STAT_START_STOPWATCH
-	overlays = build_appearance_list(overlays)
+	overlays += build_appearance_list(add_overlays)
-
+	POST_OVERLAY_CHANGE(src)
-	LAZYINITLIST(add_overlays) //always initialized after this point
+	STAT_STOP_STOPWATCH
-	var/a_len = add_overlays.len
+	STAT_LOG_ENTRY(SSoverlays.stats, type)
-
-	add_overlays += overlays
-	var/fa_len = add_overlays.len
-	if(NOT_QUEUED_ALREADY && fa_len != a_len)
-		QUEUE_FOR_COMPILE
 
 /atom/proc/copy_overlays(atom/other, cut_old) //copys our_overlays from another atom
 	if(!other)
@@ -174,18 +91,21 @@ SUBSYSTEM_DEF(overlays)
 			cut_overlays()
 		return
 
+	STAT_START_STOPWATCH
 	var/list/cached_other = other.overlays.Copy()
-	if(cached_other)
+	if(cut_old)
-		if(cut_old || !LAZYLEN(overlays))
+		if(cached_other)
-			remove_overlays = overlays
+			overlays = cached_other
-		add_overlays = cached_other
+		else
-		if(NOT_QUEUED_ALREADY)
+			overlays = null
-			QUEUE_FOR_COMPILE
+		POST_OVERLAY_CHANGE(src)
-	else if(cut_old)
+		STAT_STOP_STOPWATCH
-		cut_overlays()
+		STAT_LOG_ENTRY(SSoverlays.stats, type)
-
+	else if(cached_other)
-#undef NOT_QUEUED_ALREADY
+		overlays += cached_other
-#undef QUEUE_FOR_COMPILE
+		POST_OVERLAY_CHANGE(src)
+		STAT_STOP_STOPWATCH
+		STAT_LOG_ENTRY(SSoverlays.stats, type)
 
 //TODO: Better solution for these?
 /image/proc/add_overlay(x)

code/datums/datacore.dm

@@ -274,8 +274,6 @@ GLOBAL_DATUM_INIT(data_core, /datum/datacore, new)
 
 		var/static/record_id_num = 1001
 		var/id = num2hex(record_id_num++,6)
-		// We need to compile the overlays now, otherwise we're basically copying an empty icon.
-		COMPILE_OVERLAYS(H)
 		var/mutable_appearance/character_appearance = new(H.appearance)
 
 		//These records should ~really~ be merged or something

code/datums/holocall.dm

@@ -322,7 +322,6 @@
 		if(outfit_type)
 			mannequin.equipOutfit(outfit_type,TRUE)
 		mannequin.setDir(SOUTH)
-		COMPILE_OVERLAYS(mannequin)
 		. = image(mannequin)
 		unset_busy_human_dummy("HOLODISK_PRESET")
 

code/game/machinery/firealarm.dm

@@ -126,32 +126,26 @@
 	if(machine_stat & NOPOWER)
 		return
 
-	. += "fire_overlay"
+	. += mutable_appearance(icon, "fire_overlay")
 	if(is_station_level(z))
-		. += "fire_[SSsecurity_level.get_current_level_as_number()]"
 		. += mutable_appearance(icon, "fire_[SSsecurity_level.get_current_level_as_number()]")
 		. += emissive_appearance(icon, "fire_[SSsecurity_level.get_current_level_as_number()]", alpha = src.alpha)
 	else
-		. += "fire_[SEC_LEVEL_GREEN]"
 		. += mutable_appearance(icon, "fire_[SEC_LEVEL_GREEN]")
 		. += emissive_appearance(icon, "fire_[SEC_LEVEL_GREEN]", alpha = src.alpha)
 
 	if(!(my_area?.fire || LAZYLEN(my_area?.active_firelocks)))
 		if(my_area?.fire_detect) //If this is false, leave the green light missing. A good hint to anyone paying attention.
-			. += "fire_off"
 			. += mutable_appearance(icon, "fire_off")
 			. += emissive_appearance(icon, "fire_off", alpha = src.alpha)
 	else if(obj_flags & EMAGGED)
-		. += "fire_emagged"
 		. += mutable_appearance(icon, "fire_emagged")
 		. += emissive_appearance(icon, "fire_emagged", alpha = src.alpha)
 	else
-		. += "fire_on"
 		. += mutable_appearance(icon, "fire_on")
 		. += emissive_appearance(icon, "fire_on", alpha = src.alpha)
 
 	if(!panel_open && my_area?.fire_detect && my_area?.fire) //It just looks horrible with the panel open
-		. += "fire_detected"
 		. += mutable_appearance(icon, "fire_detected")
 		. += emissive_appearance(icon, "fire_detected", alpha = src.alpha) //Pain
 

code/game/objects/effects/decals/decal.dm

@@ -44,3 +44,13 @@
 		CRASH("Turf decal initialized in an object/nullspace")
 	T.AddElement(/datum/element/decal, icon, icon_state, dir, null, null, alpha, color, null, FALSE, null)
 	return INITIALIZE_HINT_QDEL
+
+#ifdef UNIT_TESTS
+// If we don't do this, turf decals will end up stacking up on a tile, and break the overlay limit
+// I hate it too bestie
+/obj/effect/turf_decal/Destroy()
+	if(GLOB.running_create_and_destroy)
+		var/turf/T = loc
+		T.RemoveElement(/datum/element/decal, icon, icon_state, dir, null, null, alpha, color, null, FALSE, null)
+	return ..()
+#endif

code/game/objects/items/robot/items/storage.dm

@@ -132,7 +132,6 @@
 	. = ..()
 	var/mutable_appearance/arm = mutable_appearance(icon = icon, icon_state = "borg_beaker_apparatus_arm")
 	if(stored)
-		COMPILE_OVERLAYS(stored)
 		stored.pixel_x = 0
 		stored.pixel_y = 0
 		var/mutable_appearance/stored_copy = new /mutable_appearance(stored)
@@ -209,7 +208,6 @@
 	icon_state = null // hides the original icon (otherwise it's drawn underneath)
 	var/mutable_appearance/bag
 	if(stored)
-		COMPILE_OVERLAYS(stored)
 		var/mutable_appearance/stored_organ = new /mutable_appearance(stored)
 		stored_organ.layer = FLOAT_LAYER
 		stored_organ.plane = FLOAT_PLANE
@@ -247,7 +245,6 @@
 	. = ..()
 	var/mutable_appearance/arm = mutable_appearance(icon, "borg_hardware_apparatus_arm1")
 	if(stored)
-		COMPILE_OVERLAYS(stored)
 		stored.pixel_x = -3
 		stored.pixel_y = 0
 		if(!istype(stored, /obj/item/circuitboard))

code/game/objects/items/storage/wallets.dm

@@ -97,7 +97,6 @@
 	cached_flat_icon = null
 	if(!front_id)
 		return
-	COMPILE_OVERLAYS(front_id)
 	. += mutable_appearance(front_id.icon, front_id.icon_state)
 	. += front_id.overlays
 	. += mutable_appearance(icon, "wallet_overlay")

code/modules/admin/verbs/ert.dm

@@ -46,7 +46,6 @@
 
 	equipAntagOnDummy(mannequin, ert)
 
-	COMPILE_OVERLAYS(mannequin)
 	CHECK_TICK
 	var/icon/preview_icon = icon('icons/effects/effects.dmi', "nothing")
 	preview_icon.Scale(48+32, 16+32)

code/modules/admin/verbs/mapping.dm

@@ -309,7 +309,6 @@ GLOBAL_VAR_INIT(say_disabled, FALSE)
 					qdel(I)
 				randomize_human(D)
 				D.dress_up_as_job(JB, TRUE)
-				COMPILE_OVERLAYS(D)
 				var/icon/I = icon(getFlatIcon(D), frame = 1)
 				final.Insert(I, JB.title)
 	qdel(D)
@@ -338,7 +337,6 @@ GLOBAL_VAR_INIT(say_disabled, FALSE)
 				randomize_human(D)
 				if(JB.outfit)
 					D.equipOutfit(JB.outfit, TRUE)
-				COMPILE_OVERLAYS(D)
 				var/icon/I = icon(getFlatIcon(D), frame = 1)
 				job_key_to_icon[JB.title] = I
 		qdel(D)

code/modules/antagonists/_common/antag_datum.dm

@@ -354,7 +354,6 @@ GLOBAL_LIST_EMPTY(antagonists)
 /datum/antagonist/proc/render_preview_outfit(datum/outfit/outfit, mob/living/carbon/human/dummy)
 	dummy = dummy || new /mob/living/carbon/human/dummy/consistent
 	dummy.equipOutfit(outfit, visualsOnly = TRUE)
-	COMPILE_OVERLAYS(dummy)
 	var/icon = getFlatIcon(dummy)
 
 	// We don't want to qdel the dummy right away, since its items haven't initialized yet.

code/modules/client/preferences/middleware/species.dm

@@ -21,7 +21,6 @@
 		dummy.set_species(species_type)
 		dummy.equipOutfit(/datum/outfit/job/assistant/consistent, visualsOnly = TRUE)
 		dummy.dna.species.prepare_human_for_preview(dummy)
-		COMPILE_OVERLAYS(dummy)
 
 		var/icon/dummy_icon = getFlatIcon(dummy)
 		dummy_icon.Scale(64, 64)

code/modules/industrial_lift/industrial_lift.dm

@@ -17,6 +17,8 @@ GLOBAL_LIST_EMPTY(lifts)
 	canSmoothWith = list(SMOOTH_GROUP_INDUSTRIAL_LIFT)
 	obj_flags = CAN_BE_HIT | BLOCK_Z_OUT_DOWN
 	appearance_flags = PIXEL_SCALE|KEEP_TOGETHER //no TILE_BOUND since we're potentially multitile
+	// If we don't do this, we'll build our overlays early, and fuck up how we're rendered
+	blocks_emissive = 0
 
 	///ID used to determine what lift types we can merge with
 	var/lift_id = BASIC_LIFT_ID
@@ -246,6 +248,8 @@ GLOBAL_LIST_EMPTY(lifts)
 
 	forceMove(locate(min_x, min_y, z))//move to the lower left corner
 	set_movement_registrations(locs - old_loc)
+	blocks_emissive = EMISSIVE_BLOCK_GENERIC
+	update_appearance()
 	return TRUE
 
 ///returns an unordered list of all lift platforms adjacent to us. used so our lift_master_datum can control all connected platforms.

code/modules/mob/dead/new_player/preferences_setup.dm

@@ -106,6 +106,5 @@
 		mannequin.job = preview_job.title
 		mannequin.dress_up_as_job(preview_job, TRUE)
 
-	COMPILE_OVERLAYS(mannequin)
 	return mannequin.appearance
 */

code/modules/mob/living/simple_animal/hostile/zombie.dm

@@ -40,7 +40,6 @@
 	var/mob/living/carbon/human/dummy/dummy = new
 	dummy.equipOutfit(outfit)
 	dummy.set_species(/datum/species/zombie)
-	COMPILE_OVERLAYS(dummy)
 	icon = getFlatIcon(dummy)
 	qdel(dummy)
 */

code/modules/unit_tests/create_and_destroy.dm

@@ -3,6 +3,7 @@
 	//You absolutely must run last
 	priority = TEST_DEL_WORLD
 
+GLOBAL_VAR_INIT(running_create_and_destroy, FALSE)
 /datum/unit_test/create_and_destroy/Run()
 	//We'll spawn everything here
 	var/turf/spawn_at = run_loc_floor_bottom_left
@@ -114,6 +115,7 @@
 	var/list/cached_contents = spawn_at.contents.Copy()
 	var/baseturf_count = length(spawn_at.baseturfs)
 
+	GLOB.running_create_and_destroy = TRUE
 	for(var/type_path in typesof(/atom/movable, /turf) - ignore) //No areas please
 		if(ispath(type_path, /turf))
 			spawn_at.ChangeTurf(type_path, /turf/baseturf_skipover)
@@ -138,6 +140,7 @@
 			for(var/atom/to_kill in to_del)
 				qdel(to_kill)
 
+	GLOB.running_create_and_destroy = FALSE
 	//Hell code, we're bound to have ended the round somehow so let's stop if from ending while we work
 	SSticker.delay_end = TRUE
 	//Prevent the garbage subsystem from harddeling anything, if only to save time

code/modules/unit_tests/screenshot_humanoids.dm

@@ -30,7 +30,6 @@
 
 /datum/unit_test/screenshot_humanoids/proc/get_flat_icon_for_all_directions(atom/thing)
 	var/icon/output = icon('icons/effects/effects.dmi', "nothing")
-	COMPILE_OVERLAYS(thing)
 
 	for (var/direction in GLOB.cardinals)
 		var/icon/partial = getFlatIcon(thing, defdir = direction, no_anim = TRUE)

code/modules/unit_tests/screenshot_saturnx.dm

@@ -14,7 +14,6 @@
 
 /datum/unit_test/screenshot_saturnx/proc/get_flat_icon_for_all_directions(atom/thing)
 	var/icon/output = icon('icons/effects/effects.dmi', "nothing")
-	COMPILE_OVERLAYS(thing)
 
 	for (var/direction in GLOB.cardinals)
 		var/icon/partial = getFlatIcon(thing, defdir = direction)

modular_skyrat/master_files/code/modules/mob/dead/new_player/preferences_setup.dm

@@ -35,5 +35,4 @@
 					gent.aroused = AROUSAL_FULL
 					gent.update_sprite_suffix()
 	mannequin.update_body()
-	COMPILE_OVERLAYS(mannequin)
 	return mannequin.appearance

modular_skyrat/modules/customization/modules/mob/dead/new_player/preferences_setup.dm

@@ -108,7 +108,6 @@
 			mannequin.underwear_visibility = UNDERWEAR_HIDE_UNDIES | UNDERWEAR_HIDE_SHIRT | UNDERWEAR_HIDE_SOCKS
 	mannequin.update_body() //Unfortunately, due to a certain case we need to update this just in case
 
-	COMPILE_OVERLAYS(mannequin)
 	parent.show_character_previews(new /mutable_appearance(mannequin))
 	unset_busy_human_dummy(DUMMY_HUMAN_SLOT_PREFERENCES)
 
@@ -243,7 +242,6 @@
 		body.equipOutfit(outfit, TRUE)
 
 	var/icon/out_icon = icon('icons/effects/effects.dmi', "nothing")
-	COMPILE_OVERLAYS(body)
 	for(var/D in showDirs)
 		var/icon/partial = getFlatIcon(body, defdir=D)
 		out_icon.Insert(partial,dir=D)