Here is what I tried, (I was curious myself)...There is probably away of doing it all in Bryce, but I haven't quite worked it out yet... 1. I made my scene and textured it all with a basic altitude/gradient type texture, with ambience and diffusion both set to 100, I textured the things that would be cold with light, bright colours, and the semi-cool objects with medium colours, the "hot" stuff with dark colours (this is for post inversion). I renderered the scene. 2. then I opened the image in Corel Photopaint (or whatever image editor you use, Photoshop, Paintshop Pro, ect) I applied a gradient blur, set to about 1 or 2, then inverted the image (invert or negative, whatever your app calls it). 3. Then I edited the image's tone curve (pulled the little tone curve spline line around until it looked like a smooth "M"), to get a solarization effect. I dont know if this is what you where after, let me know if you need to know anything about this method. Hope it helps.