It was the strangest thing! That weird shadow was appearing there, but I tried a few things:

1. Increasing the shadow map size made it increasingly less noticable.
2. It disappeared when using the Poser 4 renderer.
3. Even with a small shadow map and the Firefly renderer, it did not appear at all if I put a figure "inside" it, which is the way it is supposed to be, of course.

So my mysterious problem is not really so much of a problem, but it still is mysterious. I think I've reached the "don't mess with it further" point. Now comes the fun part: making the cute texture map! :biggrin:

Thanks for all the help!