Thanks, Brent -- I've tried variations on what you're suggesting, but not exactly your idea; I can see that I'll be spending a weekend of trial and error. Yes, there's an animation rendered, but I'm just in testing phase -- I was worried that something like this might come up.... I'm afraid this might be a limitation of RayDream's rendering engine -- maybe I'll try the other renderers -- hybrid, non - 5.5 raytracer, those things.... If I come up with a solution I'll let you know. And thanks for the input. And, of course, if anyone else has any ideas, please post them.... I'm trying everything I can think of.... - Dex