I don’t think the AI understood that the orcs are in the same room as the grenade, and it is only 2m from any wall when it goes off. Plus chunky salsa is the whole reason to specify what the walls are made of so failure all around.

SWADE rolls lots of d12s at higher advancement levels.

I want to throw a frag grenade into a 4m x 4m room that has two adjacent exterior concrete walls, one interior wooden wall and and another interior wooden wall that has the physical barrier spell cast next to it (mostly to block a door but it covers the whole wall). How much damage will the two orcs in the room have to soak? Assume the grenade lands in the middle of the room. One orc is in the corner of the two concrete walls, the other is next to the wooden wall without the barrier. . DV 18P(f) AP -5 BLAST -1/m. Edit: forgot to include the barrier was cast at force 5