As promised, I loaded CS3 on my PC and here are the results: My test scene is a simple Poser figure (The Daz Farie) with default textures and 2 lights, one set next to 0 just for the flare effect. Global Illumination was used as render engine, with indirect lighting turned on. Mac is a Dual G4-450 with 1GB PC100 SDRAM and OSX 10.2.6 PC is a Pentium 4 2.53Ghz with 512MB DDRRAM (333) and Win XP Pro. Really not a fair comparison as the Mac is several years old (early 2000) and the PC is pretty recent. Anyway Carrara 2.1: Mac - 7:39 PC - 2:43 Carrara 3 Beta: Mac - 2:02 PC - 0:49 Quite a significant performance boost in rendering. However the scene rendered in C3 is darker on both platforms and I have yet to figure out why. Maybe some switch or light setting defaulted to something other then what was set in C2. So if you have an older Mac you get a major speed boost. Now I just need to figure out why I am using this old Mac when my PC is obviously faster...;-) Can't wait to see what a G5 does this in... Cheers. Paul