Vertex Shaders

[Thomas]

If you get this error then either your graphics card simply is not capable of running Penumbra or the drivers have very poor OpenGL support. I would bet on the latter.

Does any other OpenGL based games like Doom 3 work? Also try uninstall the graphics drivers before installing the new one, might be some screwup.

jimmybob:
This might simply be that the ATI vista drivers has not added full OpenGL support yet. For some reason card manufactorers seem not to think OpenGL is that much needed...