8800 GTX problem.

[anka]

Make sure to unistall the drivers you have now, restart the computer and then install the latest.

Penumbra uses OpenGL (and not DirectX like Crysis) and the OpenGL installation might be corrupt or in some other way not correct. That is why you need to be sure to uninstall and reboot before installing drivers again.

Yeah, that's just what I did. Still doesn't work...