Following /tg/'s lead, removes set background 1 for smoother gameplay.

code/ZAS/FEA_system.dm

@@ -126,7 +126,7 @@ var/datum/controller/air_system/air_master
 	//Inputs: None.
 	//Outputs: None.
 
-	set background = 1
+	//set background = 1
 	world << "\red \b Processing Geometry..."
 	sleep(-1)
 
@@ -157,7 +157,7 @@ Total Unsimulated Turfs: [world.maxx*world.maxy*world.maxz - simulated_turf_coun
 	//Outputs: None.
 
 
-	set background = 1
+	//set background = 1
 
 	while(1)
 		if(!kill_air)

code/__HELPERS/game.dm

@@ -189,7 +189,7 @@
 
 /proc/get_mobs_in_radio_ranges(var/list/obj/item/device/radio/radios)
 
-	set background = 1
+	//set background = 1
 
 	. = list()
 	// Returns a list of mobs who can hear any of the radios given in @radios

code/controllers/failsafe.dm

@@ -22,7 +22,7 @@ var/datum/controller/failsafe/Failsafe
 /datum/controller/failsafe/proc/process()
 	processing = 1
 	spawn(0)
-		set background = 1
+		//set background = 1
 		while(1)	//more efficient than recursivly calling ourself over and over. background = 1 ensures we do not trigger an infinite loop
 			if(!master_controller)		new /datum/controller/game_controller()	//replace the missing master_controller! This should never happen.
 			if(!lighting_controller)	new /datum/controller/lighting()		//replace the missing lighting_controller

code/controllers/lighting_controller.dm

@@ -33,7 +33,7 @@ datum/controller/lighting/New()
 datum/controller/lighting/proc/process()
 	processing = 1
 	spawn(0)
-		set background = 1
+		//set background = 1
 		while(1)
 			if(processing)
 				iteration++
@@ -67,7 +67,7 @@ datum/controller/lighting/proc/process()
 datum/controller/lighting/proc/Initialize(var/z_level)
 	processing = 0
 	spawn(-1)
-		set background = 1
+		//set background = 1
 		for(var/i=1, i<=lights.len, i++)
 			var/datum/light_source/L = lights[i]
 			if(L.check())

code/controllers/master_controller.dm

@@ -111,7 +111,7 @@ datum/controller/game_controller/proc/setup_objects()
 datum/controller/game_controller/proc/process()
 	processing = 1
 	spawn(0)
-		set background = 1
+		//set background = 1
 		while(1)	//far more efficient than recursively calling ourself
 			if(!Failsafe)	new /datum/controller/failsafe()
 

code/game/area/Space Station 13 areas.dm

@@ -1855,7 +1855,7 @@ proc/process_ghost_teleport_locs()
 				Obj << mysound
 
 	proc/process()
-		set background = 1
+		//set background = 1
 
 		var/sound/S = null
 		var/sound_delay = 0
@@ -1979,7 +1979,7 @@ var/list/the_station_areas = list (
 				Obj << mysound
 
 	proc/process()
-		set background = 1
+		//set background = 1
 
 		var/sound/S = null
 		var/sound_delay = 0

code/game/gamemodes/blob/theblob.dm

@@ -51,7 +51,7 @@
 
 	proc/Pulse(var/pulse = 0, var/origin_dir = 0)//Todo: Fix spaceblob expand
 
-		set background = 1
+		//set background = 1
 
 		if(run_action())//If we can do something here then we dont need to pulse more
 			return

code/game/gamemodes/events/ninja_equipment.dm

@@ -114,7 +114,7 @@ ________________________________________________________________________________
 //=======//PROCESS PROCS//=======//
 
 /obj/item/clothing/suit/space/space_ninja/proc/ntick(mob/living/carbon/human/U = affecting)
-	set background = 1
+	//set background = 1
 
 	//Runs in the background while the suit is initialized.
 	spawn while(cell.charge>=0)
@@ -751,7 +751,7 @@ ________________________________________________________________________________
 	return
 
 /obj/item/clothing/suit/space/space_ninja/proc/ai_holo_process()
-	set background = 1
+	//set background = 1
 
 	spawn while(hologram&&s_initialized&&AI)//Suit on and there is an AI present.
 		if(!s_initialized||get_dist(affecting,hologram.loc)>3)//Once suit is de-initialized or hologram reaches out of bounds.

code/game/machinery/bots/cleanbot.dm

@@ -161,7 +161,7 @@ text("<A href='?src=\ref[src];operation=oddbutton'>[src.oddbutton ? "Yes" : "No"
 		src.screwloose = 1
 
 /obj/machinery/bot/cleanbot/process()
-	set background = 1
+	//set background = 1
 
 	if(!src.on)
 		return

code/game/machinery/bots/ed209bot.dm

@@ -220,7 +220,7 @@ Auto Patrol: []"},
 		mode = SECBOT_IDLE
 
 /obj/machinery/bot/ed209/process()
-	set background = 1
+	//set background = 1
 
 	if (!src.on)
 		return

code/game/machinery/bots/farmbot.dm

@@ -226,7 +226,7 @@
 	return
 
 /obj/machinery/bot/farmbot/process()
-	set background = 1
+	//set background = 1
 
 	if(!src.on)
 		return

code/game/machinery/bots/floorbot.dm

@@ -209,7 +209,7 @@ var/global/list/floorbot_targets=list()
 	return (src.target != null)
 
 /obj/machinery/bot/floorbot/process()
-	set background = 1
+	//set background = 1
 
 	if(!src.on)
 		return

code/game/machinery/bots/medbot.dm

@@ -231,7 +231,7 @@
 		src.icon_state = "medibot[src.on]"
 
 /obj/machinery/bot/medbot/process()
-	set background = 1
+	//set background = 1
 
 	if(!src.on)
 		src.stunned = 0

code/game/machinery/bots/secbot.dm

@@ -192,7 +192,7 @@ Auto Patrol: []"},
 		mode = SECBOT_IDLE
 
 /obj/machinery/bot/secbot/process()
-	set background = 1
+	//set background = 1
 
 	if(!src.on)
 		return

code/game/machinery/iv_drip.dm

@@ -72,7 +72,7 @@
 
 
 /obj/machinery/iv_drip/process()
-	set background = 1
+	//set background = 1
 
 	if(src.attached)
 		if(!(get_dist(src, src.attached) <= 1 && isturf(src.attached.loc)))

code/game/machinery/portable_turret.dm

@@ -426,7 +426,7 @@ Status: []<BR>"},
 /obj/machinery/porta_turret/process()
 	// the main machinery process
 
-	set background = 1
+	//set background = 1
 
 	if(src.cover==null && anchored) // if it has no cover and is anchored
 		if (stat & BROKEN) // if the turret is borked

code/game/objects/effects/aliens.dm

@@ -206,7 +206,7 @@
 	return
 
 /obj/effect/alien/weeds/proc/Life()
-	set background = 1
+	//set background = 1
 	var/turf/U = get_turf(src)
 /*
 	if (locate(/obj/movable, U))

code/game/objects/effects/glowshroom.dm

@@ -45,7 +45,7 @@
 		Spread()
 
 /obj/effect/glowshroom/proc/Spread()
-	set background = 1
+	//set background = 1
 	var/spreaded = 1
 
 	while(spreaded)
@@ -93,7 +93,7 @@
 		sleep(delay)
 
 /obj/effect/glowshroom/proc/CalcDir(turf/location = loc)
-	set background = 1
+	//set background = 1
 	var/direction = 16
 
 	for(var/wallDir in cardinal)

code/game/supplyshuttle.dm

@@ -157,7 +157,7 @@ var/list/mechtoys = list(
 			supply_packs[P.name] = P
 
 		spawn(0)
-			set background = 1
+			//set background = 1
 			while(1)
 				if(processing)
 					iteration++

code/modules/admin/verbs/check_customitem_activity.dm

@@ -36,7 +36,7 @@ var/inactive_keys = "None<br>"
 	usr << browse(dat, "window=inactive_customitems;size=600x480")
 
 /proc/populate_inactive_customitems_list(var/client/C)
-	set background = 1
+	//set background = 1
 
 	if(checked_for_inactives)
 		return

code/modules/mob/living/carbon/alien/humanoid/life.dm

@@ -10,7 +10,7 @@
 
 /mob/living/carbon/alien/humanoid/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (monkeyizing)
 		return

code/modules/mob/living/carbon/alien/larva/life.dm

@@ -7,7 +7,7 @@
 
 /mob/living/carbon/alien/larva/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (monkeyizing)
 		return

code/modules/mob/living/carbon/brain/life.dm

@@ -1,6 +1,6 @@
 /mob/living/carbon/brain/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 	..()
 
 	if(stat != DEAD)

code/modules/mob/living/carbon/human/human.dm

@@ -1155,7 +1155,7 @@
 /*
 /mob/living/carbon/human/verb/simulate()
 	set name = "sim"
-	set background = 1
+	//set background = 1
 
 	var/damage = input("Wound damage","Wound damage") as num
 

code/modules/mob/living/carbon/human/life.dm

@@ -50,7 +50,7 @@
 
 /mob/living/carbon/human/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (monkeyizing)	return
 	if(!loc)			return	// Fixing a null error that occurs when the mob isn't found in the world -- TLE

code/modules/mob/living/carbon/metroid/life.dm

@@ -9,7 +9,7 @@
 
 /mob/living/carbon/slime/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (src.monkeyizing)
 		return

code/modules/mob/living/carbon/monkey/life.dm

@@ -11,7 +11,7 @@
 
 /mob/living/carbon/monkey/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 	if (monkeyizing)	return
 	if (update_muts)
 		update_muts=0

code/modules/mob/living/carbon/zombie/zombie.dm

@@ -94,7 +94,7 @@
 		frustration = 0
 
 	proc/process()
-		set background = 1
+		//set background = 1
 		var/quick_move = 1
 		var/slow_move = 0
 
@@ -273,7 +273,7 @@
 
 
 	proc/idle()
-		set background = 1
+		//set background = 1
 		var/quick_move = 0
 
 		if(state != 2 || src.stat == 2 || target) return

code/modules/mob/living/silicon/ai/freelook/chunk.dm

@@ -68,7 +68,7 @@
 
 /datum/camerachunk/proc/update()
 
-	set background = 1
+	//set background = 1
 
 	var/list/newVisibleTurfs = list()
 

code/modules/mob/living/silicon/mommi/life.dm

@@ -1,6 +1,6 @@
 /mob/living/silicon/robot/mommi/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (src.monkeyizing)
 		return

code/modules/mob/living/silicon/robot/life.dm

@@ -1,6 +1,6 @@
 /mob/living/silicon/robot/Life()
 	set invisibility = 0
-	set background = 1
+	//set background = 1
 
 	if (src.monkeyizing)
 		return

code/modules/power/gravitygenerator.dm

@@ -113,7 +113,7 @@
 
 
 /obj/machinery/computer/gravity_control_computer/Topic(href, href_list)
-	set background = 1
+	//set background = 1
 	..()
 
 	if ( (get_dist(src, usr) > 1 ))

code/modules/power/singularity/singularity.dm

@@ -209,7 +209,7 @@ var/global/list/uneatable = list(
 
 
 /obj/machinery/singularity/proc/eat()
-	set background = 1
+	//set background = 1
 	if(defer_powernet_rebuild != 2)
 		defer_powernet_rebuild = 1
 	// Let's just make this one loop.
@@ -566,7 +566,7 @@ var/global/list/uneatable = list(
 	grav_pull = 0
 
 /obj/machinery/singularity/narsie/wizard/eat()
-	set background = 1
+	//set background = 1
 	if(defer_powernet_rebuild != 2)
 		defer_powernet_rebuild = 1
 	for(var/atom/X in orange(consume_range,src))

code/modules/research/xenoarchaeology/tools/suspension_generator.dm

@@ -20,7 +20,7 @@
 	..()
 
 /obj/machinery/suspension_gen/process()
-	set background = 1
+	//set background = 1
 
 	if (suspension_field)
 		cell.charge -= power_use

code/modules/research/xenoarchaeology/tools/tools_locater.dm

@@ -38,7 +38,7 @@
 			scan_ticks++
 			if(prob(scan_ticks * 10))
 				spawn(0)
-					set background = 1
+					//set background = 1
 					if(processing_objects.Find(src))
 						//scan radios in the world to try and find one
 						var/cur_dist = 999

code/world.dm

@@ -184,7 +184,7 @@
 #define INACTIVITY_KICK	6000	//10 minutes in ticks (approx.)
 /world/proc/KickInactiveClients()
 	spawn(-1)
-		set background = 1
+		//set background = 1
 		while(1)
 			sleep(INACTIVITY_KICK)
 			for(var/client/C in clients)