I've modified my plans and decided to try lasering the box for the perspective piece, I'm not good enough at woodworking, and Alan is too busy to help, so I took it down to Keith's laser. It didn't cut through, really even after two passes, and he said that I should be able to cut it out with a stanley knife, so I'll try... I'm skeptical. The engraving in the image above is actually sandblasted, with a vinyl resist. The reprographics guy was pretty skeptical that it would work, but I'm pretty happy with the results. Below is the beginning of one that I started with wheel engraving. They are different pieces of glass, so I'll have two when they're both done.