I made a quick pic up in bryce 4 (320x240) with 20% viewable using glass textures - reflective sea and a terrain. Test system is a amd 1.2gig with 512 megs ram. Bryce 4 5 seconds - no antialiasing Bryce 4 26 seconds - normal Bryce 4 80 seconds - high Bryce 5 6 seconds - no aa Bryce 5 30 seconds - normal Bryce 5 89 seconds - super Bryce 5 340 seconds - supreme ray per pixel 64 maximum ray depth 6 total int reflections 2 Bryce 5 806 seconds - supreme ray per pixel 144 maximum ray depth 6 total int reflections 2 Bryce 5 952 seconds - supreme ray per pixel 144 maximum ray depth 12 total int reflections 10 Bryce 5 952 to - supreme ray per pixel 144 1200 maximum ray depth 24 total int reflections 22 Bryce 5 952 to - supreme ray per pixel 144 1200 maximum ray depth 100 total int reflections 98 Bryce 5 1860 - supreme ray per pixel 256 maximum ray depth 100 total int reflections 98 15400 seconds - all above and volumetric Didnt make much of a difference with maximum ray depth or total int reflections but id assume if i had a larger number of glass type objects it would up the numbers even higher. Given my new system is 4.53x faster the the old p2-400 i use to have, looks like just going to supreme eats up the cpu and spits it out even with my old intel chip. Soon as i increase the ray per pixel up im actually worse off then before upgrading. (anyone have 4 or 8 elcheapo 1 gig boxes to lend me?) Im quite concerned since i always render at 1600x1200 for my final pic (desktop size) and have render at 3000x4000 for a 100 dpi 30in x 40in photo print at work. My guestimate for that very simple pic is: 12+ hours at 1600x1200 and 72 hours for print quality. Given a real picture is 10's of times more complicated i think im doomed.