Weird Graphical PP Bug

[Thomas]

The only thing I can think of is that resoution that you set, 1920x1200, is not the resolution that is being used in game. This will cause the game to use the wrong numbers when doing some stuff. Try setting some other resolution and see if that helps.

It might also be that your card does not support render textures that large, in which case the solution would also be to lower the resolution.

What card are you using?