The owner of the local MacStore is letting me play on a quad G5 with a 30" cinima display, I compiled blender with G5 optimizations, renders really fast. WoW! a 30" display really makes blending easy on the eyes. He wants me to do a blender demo for the local mac group, should be fun. I guess I’ll need to dust off some of my old tutorials, if I can find them.
The biggest difference was, when using the official version baking a fluid sim produced an error message, with the version I compiled on the G5 the fluid sim workes, and the rendering is about 200% faster. I had problems with the interface before the system was upgraded to 10.4.4, even now the interface is quit slow, even compared to my old 550mhz power book. Nvidia used to be the best for blender hopefully they’ll get the problem (what ever it maybe) fixed.
About the best optimization for the G4 is -ffast-math, -mcpu=7450, -mtune=7450, -03 using this I’ve found a 15-20% increase (faster rendering) using -fast -mpowerpc -mtune=G4 was actually slower.