Thanks, DustRider... that explains a lot. Poser probably runs smoother because it's looking for consumer level implimentation of OGL, while other apps that seem sluggish are looking for other implimentations. That's what I gathered. As I mentioned, Poser crashes on certain pro cards completely, while others need to reduce their acceleration rates to get it to run. Meanwhile, most cards handle it fine. It's a tricky thing this OGL.