lod bias changing under voodoo4/5

anyone happen to know how to change texture lod bias parameters in code with voodoo4/5 hardware ? (is this contained to some 3dfx extension or something)
(i know it is possible because you can switch that from display settings)
Thank you.

This should not be stupid question/ so this is difficult question ? anyone
(i know voodoo4/5 is old card, but i wanna just support those anyway)

[Overmind]

Not everything that is possible in display settings is also possible in code. 3DFX never supported OpenGL well, so it might be that it is just not possible.

I have to admit that I don't know what "changing the texture lod bias parameters" is, but to me it sounds like it is a special feature that only voodoo cards can do. That means when you use this feature just to support old voodoo cards, it will break compatibility with other cards...

But as I said, I don't know what this feature is about, so I might be completely wrong.

[harsman]

If it supports EXT_lod_bias (or the later versions) just use that. If it doesn't support that, bad luck.