GPL natively supports 3dfx and Rendition verite cards. There is a beta (beta
for ever it would appear) OpenGL patch which allows use with TNT/TNT2 cards,
but has major performance problems drawing the wing mirrors. (Most TNT users
have to set the mirrors to draw only every 2nd or 3rd frame in order to be
playable.
I haven't heard of anyone running totally successfully in OpenGL on any
other card, so you'd be stuck with software I'm afraid....
Mike.