After couple hours of thinking and searching archives of other Bryce challenges I came to conclusion that this has not been done yet ! SPEED Yep, speed it is, of things, of light, of sound, of thought, whatever rocks your boat, imports are all allowed, no backdrops, of course, everything needs to be 3D and rendered in Bryce 100%, all textures allowed too !!! Postwork as much as you like or want or need !!!!!! Have fun ! :) P.S. I hope this is a good choice, i believe, there is lot of room for diversity ! :)