Please excuse my delay; I've been working on it, mostly in the Material Room. Thanks for the suggestion... I think it's one of the things I haven't tried. But, I just tried it and it didn't do the trick :( Maybe it's the ancient prop I've been using? (It is the skydome from 3DWorlds by HMann.) However, I've had the same problem using a JPEG on the Hi-Res Square primitive.