Able to loop active scenes for cycling backdrops or other ideas. It's like tweening the last 1000 frames to return to the same starting point. Ideas for Water rippling or a mountain stream or waterfall shot, wind-blowing trees and fields of wheat, or other static scenes with active cycling. The first frame is held in memory and when there only remains a few seconds the render goes back to the first frame. A loop render would be oh-so-handy for many uses. Can only be done with a still camera. No movement so the software can get back to the exact scene start.
Making it Real