I feel a little obsessive...I have Nerd's backdrop (which I use regularly), Cyclorama, Infinity Cove (which seems to take the same sets as Nerd's backdrop in most cases), the Nikitta Creed's morphing terrain backdrop (haven't used it yet), 3DModelez, Dazn's morphing terrain, and one that not many people seem to support but has some handy features: Ricardi's Poser Studio - Set Creation System. My problem is much like MachineClaw's...many of the photographs don't blend well with the lighting of the Poser characters. More important to me than the tool (because, obviously, I seem to have quite a collection), is that it works well in both Poser 4 and 5 (not everything does), and that it blends well with other models (plays well with others?) when it comes to lighting and looking...well, not realistic but blended, as if the characters and the scene belonged together.