I used the Boolean modifier to make a hole in my gun and it looks like a shadery face covering up the hole. It's a bit hard to see and it isn't really a face. The hole i made goes through 3 meshes.
(You need to click on the pic to see the shady face)
Here's the file so you can check it out: http://blend-exchange.giantcowfilms.com/embedImage.png?bid=404
Any solution?