My copy of Bryce 5 is still "on the truck" as they say, but here's my guess - it'll be about the same as long as you keep the rendering options exactly the same as they were in Bryce 4. Bryce 5 adds in soft shadows, high-detail textures, and other things that will totally slam your render times if not used judiciously. There is a chance that your average render time will go down slightly because of changes made to the render code to accomodate the additional options, but that's hard to say. Bryce is a real ray-tracer and a CPU power hog. IMHO it does a damn good job for what its doing at the price point its at. For reference, I work in a shop were the real artists (me, I write for a living) use Max4 and Maya in a production environment, and believe me, their real raytracing options are slow too. :-) TomD