So, in a recent Pathfinder game, there was a character with an Aasen mortar launcher. Said launcher states:
After the point of impact is determined, the shell explodes and deals 6d6 points of bludgeoning, piercing, and slashing damage to all creatures in a 30-foot radius (Reflex DC 20 for half).
How does this interact with walls? Do creatures in total cover take damage? Obviously, the weapon doesn't damage non-creature objects, so the cover itself cant be destroyed. Is there a non-magical equivalent of the rule for emanation spells that they need line of effect to affect things?