Yikes! I need to copy that and paste in into my reference notebook (which I keep for all my complex software). That explains a lot and it points me in directions that I need to understand better. I have watched the video tutorials on Poser and am dismayed to find that they almost totally ignore this kind of information on lighting. Of all people, I certainly understand just how important it is to get a handle on it in this program. Thanks very much for your considered and detailed reply.