Good to see your work evolving Lee. Be careful with that laser though, don't let any of those beams go directly into the lens as may burn your sensor permanently. You can set it up initially with the cap on the lens and check whether there are any beams hitting the cap, if not then good to go. Great with the addition of smoke, been meaning to stock up on some more pellets myself. Hope to see more of your creations soon.
RE: Between the walls