I have Eagle VANTA videocard.
In the half life, D3D full O.K., but when I use the OpenGL, it seems the textures on the wall and other fields are mirrored. The information texts defective, too (title of maps).
I tried to update the video driver, the agp driver and then to reinstall WIN98.
It didn't help.
The OpenGl doesn't work in Quake2, too.