Oops. Postscript to that last post: The reason I said OpenGL is preferred is because it is an open standard created by Silicon Graphics (originally) that can be used or implimented anywhere: Mac, Windows, or UNIX - unlike DirectX. Hardware vendors support OpenGL for this reason, and video drivers that use OpenGL are availlable for almost every video card/chipset out there. I just wanted to make sure that I was completely clear. As it was, to me it sounded as though OpenGL was primarily only a UNIX standard, when in fact, it's everywhere on almost every major OS. T.J.