I have an ATI Rage 128 video card with 32 megs of memory on board. I’m having quite a bit of trouble with the OpenGL drivers for this card. Things that work under the MS Windows software implementation don’t seem to work using the driver’s impelementation. For instance, under the software implementation I can highlight 3D objects by switching the glDepthFunc to GL_LEQUAL, and re-rendering the object to the front buffer. As long as I have faithfully reproduced the matrix state, the entire object changes color correctly. However, when I switch to a hardware accelerated pixel format (and thus the ATI driver) and perform the same highlighting operation, I end up with parts of the object highlighting and other parts remaining there original color. There are other peculiarities that I noticed, but I won’t get into all of them.
Has anyone else had similar experiences with ATI drivers?