post processing effects turns my screen blank

when i enabled post processing effects because whenever i got drunk the screen wouldn't be effected everything except players classes turns black.
Can someone plz tell me what is up(pretty sure it not my video card because its never done it before)

also when i adjust grapghics to lowest setting it turns everything back to normal

Wouldn't this be better posted in the tech forum?

Anyway, post your system specs including your graphics card. Just because it hasn't done it before doesn't mean that it's starting to go tits up now.