Rewrites Atmospherics

code/modules/blob2/blobs/base_blob.dm

@@ -46,9 +46,8 @@ var/list/blobs = list()
 		color = null
 		set_light(0)
 
-/obj/structure/blob/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	if(air_group || (height==0))
-		return TRUE
+// Blob tiles are not actually dense so we need Special Code(tm).
+/obj/structure/blob/CanPass(atom/movable/mover, turf/target)
 	if(istype(mover) && mover.checkpass(PASSBLOB))
 		return TRUE
 	else if(istype(mover, /mob/living))
@@ -57,12 +56,9 @@ var/list/blobs = list()
 			return TRUE
 	else if(istype(mover, /obj/item/projectile))
 		var/obj/item/projectile/P = mover
-		if(P.firer && P.firer.faction == "blob")
+		if(istype(P.firer) && P.firer.faction == "blob")
 			return TRUE
-		return FALSE
-	else
-		return FALSE
-//	return ..()
+	return FALSE
 
 /obj/structure/blob/examine(mob/user)
 	..()
@@ -257,7 +253,7 @@ var/list/blobs = list()
 	if(!P)
 		return
 
-	if(P.firer && P.firer.faction == "blob")
+	if(istype(P.firer) && P.firer.faction == "blob")
 		return
 
 	var/damage = P.get_structure_damage() // So tasers don't hurt the blob.

code/modules/blob2/blobs/shield.dm

@@ -6,6 +6,7 @@
 	desc = "A solid wall of slightly twitching tendrils."
 	max_integrity = 100
 	point_return = 4
+	can_atmos_pass = ATMOS_PASS_NO
 
 /obj/structure/blob/shield/core
 	point_return = 0