Bryce 5 take more times than Bryce 4 but it depends a lot on how you are setting your render specifications. Bryce 5 have new control for render, so he can take more time, but equal picture take about the same time if the settings are the same. If you have more than one computer or one computer with 2 processors, there the use for network rendering that is very good. If you think of staying with Bryce 4 or go with 5...Me i did the choice and bought Bryce 5 because i like very much what he is offering...Network Render, Metal balls, Tree Generator, a better Terrain Editor and lighting control with a new render settings for quite real effects. Like they say...this is my 2 cents. Pleiades