516 Renderer update

code/ZAS/Fire.dm

@@ -118,6 +118,13 @@ If it gains pressure too slowly, it may leak or just rupture instead of explodin
 
 	return 0
 
+/obj/heat
+	icon = 'icons/effects/fire.dmi'
+	icon_state = "3"
+	appearance_flags = PIXEL_SCALE | NO_CLIENT_COLOR
+	render_target = HEAT_EFFECT_TARGET
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+
 /obj/fire
 	//Icon for fire on turfs.
 

code/ZAS/Zone.dm

@@ -53,6 +53,9 @@ Class Procs:
 
 	var/datum/gas_mixture/air = new
 
+	var/list/graphic_add = list()
+	var/list/graphic_remove = list()
+
 /zone/New()
 	SSair.add_zone(src)
 	air.temperature = TCMB
@@ -148,21 +151,20 @@ Class Procs:
 	air.group_multiplier = contents.len+1
 
 /zone/proc/tick()
+	// Update fires.
 	if(air.temperature >= PHORON_FLASHPOINT && !(src in SSair.active_fire_zones) && air.check_combustability() && contents.len)
 		var/turf/T = pick(contents)
 		if(istype(T))
 			T.create_fire(GLOB.vsc.fire_firelevel_multiplier)
 
-	var/world_time_counter = world.time
-	var/list/graphic_add = list()
-	var/list/graphic_remove = list()
+	// Update gas overlays.
 	if(air.check_tile_graphic(graphic_add, graphic_remove))
 		for(var/turf/simulated/T in contents)
 			T.update_graphic(graphic_add, graphic_remove)
-	var/delta_time = world.time - world_time_counter
-	if(delta_time > 5 SECONDS)
-		log_admin("AN AREA IS TAKING EXTREMELY LONG TO UPDATE: [name] WITH CONTENTS LENGTH [length(contents)] TELL MATT WITH THE ROUND ID!")
+		graphic_add.Cut()
+		graphic_remove.Cut()
 
+	// Update connected edges.
 	for(var/connection_edge/E in edges)
 		if(E.sleeping)
 			E.recheck()

code/__DEFINES/atmos.dm

@@ -49,6 +49,9 @@
 #define CARBON_LIFEFORM_FIRE_RESISTANCE (T0C + 200)
 #define CARBON_LIFEFORM_FIRE_DAMAGE     4
 
+#define FOGGING_TEMPERATURE (T0C + 5)
+#define MAX_FOG_TEMPERATURE (T0C - 50)
+
 // Phoron fire properties.
 #define PHORON_MINIMUM_BURN_TEMPERATURE    (T0C +  126) //400 K - autoignite temperature in tanks and canisters - enclosed environments I guess
 #define PHORON_FLASHPOINT                  (T0C +  246) //519 K - autoignite temperature in air if that ever gets implemented.
@@ -122,6 +125,8 @@
 #define GAS_DEUTERIUM			"deuterium"
 #define GAS_TRITIUM				"tritium"
 #define GAS_BORON				"boron"
+#define GAS_HEAT                "heat" //Not a real gas, used for visual effects
+#define GAS_COLD                "cold" //Not a real gas, used for visual effects
 
 #define	PIPE_COLOR_GREY		"#ffffff"	//yes white is grey
 #define	PIPE_COLOR_RED		"#ff0000"

code/__DEFINES/layers.dm

@@ -36,6 +36,11 @@
 
 #define OVER_OPENSPACE_PLANE -4
 
+#define HEAT_EFFECT_PLANE -4
+#define HEAT_EFFECT_TARGET    "*heat"
+#define COLD_EFFECT_TARGET    "*cold"
+#define COLD_EFFECT_BACK_TARGET "*coldb"
+#define HEAT_COMPOSITE_TARGET "*heatc"
 #define WARP_EFFECT_PLANE -3
 
 #define BLACKNESS_PLANE 0 //Blackness plane as per DM documentation.

code/__HELPERS/global_lists.dm

@@ -133,6 +133,8 @@ GLOBAL_LIST_EMPTY(contained_clothing_species_adaption_cache)
 /// Cache for outfit selection.
 GLOBAL_LIST_EMPTY(outfit_cache)
 
+GLOBAL_LIST_EMPTY(all_particles)
+
 //////////////////////////
 /////Initial Building/////
 //////////////////////////
@@ -240,6 +242,11 @@ GLOBAL_LIST_EMPTY(outfit_cache)
 		if(S.spawn_flags & IS_WHITELISTED)
 			GLOB.whitelisted_species += S.name
 
+	paths = typesof(/particles)
+	for (var/path in paths)
+		var/particles/P = new path()
+		GLOB.all_particles[P.name] = P
+
 	return TRUE
 
 GLOBAL_LIST_INIT(correct_punctuation, list("!" = TRUE, "." = TRUE, "?" = TRUE, "-" = TRUE, "~" = TRUE, \