Another thing, Doublecrash, although this may have nothing to do with your image, is the use of Alpha channels and "Volumetric World". You can't use the two together, which sucks, but I'm not sure if you're using VW or not? For example, using VW with the 2D "pict" trees will show each of the square borders that are the edges of the image map... It sucks, but alas, such is life... Hope to see the finished version, IMO that's one of the best Bryce images I've seen!