Ok, I have a room built with all kinds of crap in it. I have a skybox which makes the main room look like it's outside at night. My problem is when you shoot the walls in the main room you see the explosion, ricochet or whatever on the wall where there is not supposed to be a wall since it is a star field. Is there a way to make the walls in the main room not react to gunshots and stuff so any stray shots appear to fly off into space instead of exploding on the stars? Thanx.