The trick to shooting clear glass against against a white background is to add dark edges to the glass. The way to add dark edges is to place black panels outside of the frame, that the curved edges of the glass will pick up. The easiest way to do do this is to take a large piece of black foam core and cut a window in the middle of it. Place a diffuser panel behind the window and light it from behind to give you your white background. Shoot, so the black is just out of the frame and it will edge the clear glass with black.
Robin
