I am reconfiguring my basement theater, and the PJ is now ceiling mounted behind a wall, projecting thru a 10x16" hole in the drywall. The water heater and furnace are in the area behind the wall, and noise coming in from that opening is going to be an issue. Would glass about 2ft from the lens cause distorsion in the image? This would solve all my problems if it works, don't have a piece lying around right now to try out. thanks in advance for all input.