Agent Smith, perhaps the shadow could be faked with a ranged negative light, or an inverted (and properly elongated) bowl? Just a thought or two. clay and all, There are whole books written on radiosity. I think I have one in PDF I got with the Graphics Gems I-III CD. At the time, several yearons ago, I didn't understand what they were getting at - althought Peter Sharpe's tutorial on the subject helped me understand how to do it, I'm still not sure what it is although clay's explaination helped a little. looking forward to the article, - TJ BTW Frank Sinatra's BD today. 1915-1998 also Edward G Robinson (info from KMJ AM radio station here in Fresberg.)