A Tale of Blobs and Man

code/game/objects/effects/chem/chemsmoke.dm

@@ -3,7 +3,7 @@
 /////////////////////////////////////////////
 /obj/effect/effect/smoke/chem
 	icon = 'icons/effects/chemsmoke.dmi'
-	opacity = 0
+	opacity = TRUE
 	time_to_live = 300
 	pass_flags = PASSTABLE | PASSGRILLE | PASSGLASS //PASSGLASS is fine here, it's just so the visual effect can "flow" around glass
 
@@ -16,6 +16,9 @@
 	walk(src, 0) // Because we might have called walk_to, we must stop the walk loop or BYOND keeps an internal reference to us forever.
 	return ..()
 
+/obj/effect/effect/smoke/chem/transparent
+	opacity = FALSE
+
 /datum/effect/effect/system/smoke_spread/chem
 	smoke_type = /obj/effect/effect/smoke/chem
 	var/obj/chemholder
@@ -35,6 +38,10 @@
 		CRASH("Invalid seed datum passed! [seed] ([seed?.type])")
 	..()
 
+/datum/effect/effect/system/smoke_spread/chem/blob
+	show_log = 0
+	smoke_type = /obj/effect/effect/smoke/chem/transparent
+
 /datum/effect/effect/system/smoke_spread/chem/New()
 	..()
 	chemholder = new/obj()
@@ -155,7 +162,7 @@
 	if(passed_smoke)
 		smoke = passed_smoke
 	else
-		smoke = new /obj/effect/effect/smoke/chem(location)
+		smoke = new smoke_type(location)
 
 	if(chemholder.reagents.reagent_list.len)
 		chemholder.reagents.trans_to_obj(smoke, chemholder.reagents.total_volume / dist, copy = 1) //copy reagents to the smoke so mob/breathe() can handle inhaling the reagents
@@ -165,11 +172,13 @@
 	smoke.pixel_x = -32 + rand(-8, 8)
 	smoke.pixel_y = -32 + rand(-8, 8)
 	walk_to(smoke, T)
-	smoke.set_opacity(1)		//switching opacity on after the smoke has spawned, and then
-	sleep(150+rand(0,20))	// turning it off before it is deleted results in cleaner
-	smoke.set_opacity(0)		// lighting and view range updates
-	fadeOut(smoke)
-	qdel(smoke)
+	if(initial(smoke.opacity))
+		smoke.set_opacity(1)		//switching opacity on after the smoke has spawned, and then
+	spawn()
+		sleep(150+rand(0,20))	// turning it off before it is deleted results in cleaner
+		smoke.set_opacity(0)		// lighting and view range updates
+		fadeOut(smoke)
+		qdel(smoke)
 
 /datum/effect/effect/system/smoke_spread/chem/spores/spawnSmoke(var/turf/T, var/icon/I, var/dist = 1)
 	var/obj/effect/effect/smoke/chem/spores = new /obj/effect/effect/smoke/chem(location)

code/game/objects/effects/effect_system.dm

@@ -238,6 +238,15 @@ steam.start() -- spawns the effect
 		if(prob(25))
 			L.emote("cough")
 
+/obj/effect/effect/smoke/bad/noxious
+	opacity = 0
+
+/obj/effect/effect/smoke/bad/noxious/affect(var/mob/living/L)
+	if (!..())
+		return 0
+	if(L.needs_to_breathe())
+		L.adjustToxLoss(1)
+
 /* Not feasile until a later date
 /obj/effect/effect/smoke/bad/Crossed(atom/movable/M as mob|obj)
 	..()
@@ -369,6 +378,9 @@ steam.start() -- spawns the effect
 /datum/effect/effect/system/smoke_spread/bad
 	smoke_type = /obj/effect/effect/smoke/bad
 
+/datum/effect/effect/system/smoke_spread/noxious
+	smoke_type = /obj/effect/effect/smoke/bad/noxious
+
 /datum/effect/effect/system/smoke_spread/fire
 	smoke_type = /obj/effect/effect/smoke/elemental/fire