Video card isn’t it, as my team also uses the AMD FirePro V4800 cards to render. Same issues. I’ve also seen the color effects, and had it appear with the default settings. I was at first convinced it had to deal with the rendered resolution we were using which was 1920×1200. At lower resolutions I had more varied success but ALWAYS got failures at this res. We have since disabled GPU rendering, but I’ve also re-imaged my workstation 3 times now. I’ve been changing vid cards back and forth between the V4800 and GTX570 with exact results. When utilizing 56GB of DDR3 1333MHZ RAM I’d say that the Dynamic Ram preview setting to 512mb is a waste. Setting it lower? Why? I’ve nearly maxed out this workstation for this program alone. The program stops seeing all the threads my machine has at 12 threads, but why skimp on the dynamic preview? I ought to be able to throw 4096MB in there and still have this machine fly… I’m about one more re-image away from heading back to SVP10. It’s really to the point of asking for my upgrade fees back, times 3…