I think I'm with Tjohn on this one, and this effect itself (Depth-of-Field) can be done WAAAAYYY faster in postwork than with Bryce itself. These machines are Artificial Stupids, not Artificial Intelligence-es, and making a 17-second render go for 10 hours for no really necessary reason is just poor economics. Even for animation, it would be far faster to render to images and run the DOF with Adobe After-Effects or some such utility... But it's cool that you did this, Euxeb007, I always love to see more benchmarking and time-projections on this great program...