OK i got Penumbra: Black Plague & i love it, BUT, i have a problem which really ruins the game for me

The problem is the lighting, which seems to reflect off of a rainbow or something

...
If someone knows whats wrong i would greatly apreciate it

Try this:
1) Try updating your graphics card drivers. (uninstall old driver and rebbot before installing new!)
2) Try using a lower shader quality.
Try this:
1) Try updating your graphics card drivers. (uninstall old driver and rebbot before installing new!)
2) Try using a lower shader quality.
Thanks alot Thomas! I put the shader quality to medium and its fine =]