OpenGL is neither stable nor standardized. The specifics of the manner in which it is implemented differ and vary across each and every one of the programs and hardware platforms you just noted. It is also not backwards compatible, and there are more users of Poser (and more potentialones) without thsoe cards noted than there are with. OpenGL's current standard won't run on certain intel graphics chips -- which were a standard included with many affordbly priced OTS systems for several years that are still in widespread use (the general population base of systems worldwide is still at a point equivalent to about 4 years ago -- and this is a worldwide market that involves people who have never heard of any of us and are unlikely to ever do so) -- so it is NOT a reasonable standard for a package which is specifically targeted at the entry level, human motion based needs market. The marketplace that we are all part of here -- this rosity/pros/rdna/rotica, whatever groups of people that we all interealate with actually comprise only about a thrid of the overall market for Poser. The other two thirds are using much older systems and software than the bulk of us are. And it is for that reason -- the ongoing growth and wider range of potential systems -- that open GL is a bad idea. In short: because it makes more economic sense on the larger scale than we typcially think of.

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)