Glass is a pain to work with, in the real world. Whenever I've worked on movies (I used to work in the art department -- sets and props), the lighting guys would often ask us to remove glass from picture frames, clocks, that sort of thing, because the reflections from the glass would give the game away. Now, in 3D, you don't have to worry about the lights, crew, camera gear, and all that being reflected in a glass surface, but you do have to worry about putting SOMETHING in the scene to reflect in the glass. If your background is just grey or black, that's going to reflect in the glass. If you want it to feel reel, map a photo of a room into the background; then the glass surfaces will reflect the photo. Better yet would be to build the rest of the room. Then, you have to control where light hits, so you can make sure there's no glare or reflection on the face of the clock.... Hope this helps! - Dex