Well, it seems that the problem was, in fact, in the shaders. There was bump info, glow info, reflection info, and all sorts of stuff. I guess it was just too much for RDS to handle and keep the images smooth through an animation. So, I've rebuilt the model (significant design change, in the process), and rebuilt the shaders to be vastly simpler. Seems to be fine, now. Little, if any shimmer. And if there's shimmer in a shot, I'll change the design of the shot. (Fine since I'm just doing this project for fun; if this were something pro, I'd be looking for another solution....) Thanks again to everyone for their advice. I really appreciate it. Dex