[quoteOn the other hand, it seems to me that Poser has no great respect for logic.

ROFL. This has been my experience as well.

Nornally, things work as you describe, however... From time to time I find an environment piece that will not receive shadows. In those cases, the only way I have ever been able to get the shadows has been to either: a) lower the ground of the piece below the poser ground plane or b) place a one-sided square under the characters just above the enviroment plane and set it as a shadow catcher.

I have never been able to find a rhyme or reason for this behavior... it seems totally random. The next time I catch one doing it, I'll post and start a thread.