Comment # 2 on bug 91107 from Christoph Haag

So it wasn't an actual bug in the drivers after all.

> It was a problem with relying on undefined behavior when GL_CLIP_DISTANCE0
> is enabled and the shader does not write gl_ClipDistance[0]

https://github.com/ValveSoftware/Dota-2-Reborn/issues/79#issuecomment-115401636