Ah, I see.  Thanks much for the info.

It's too bad that material animation (which I am depending upon for my current project) is broken in Bryce 6, or I'd consider upgrading for this purpose.  At least I can continue to use Bryce 5 on my PC for now ... I'm just trying to migrate more of my work over to the Mac (now that I've got one), and was hoping to make Bryce one of those programs.