I'm another Cyclorama user, and I would use it a lot more if there were more sets for it. Anything with stuff that isn't easily made as a realistic-looking prop in Poser (without eating memory at the same time) would be good, particularly vegetation. Some ancient woodland, for example, with some really gnarly trees, or water in serious motion (storm-tossed waves, waterfalls, white water, mountain streams). Some things like that could work really well by building up the layers using transparencies.