Post processing bug.
Tried it on diff card ( currently mine is on rma and I am using hd4000 on i7-3770). So borrowed my friend gtx 660 and the same thing exist so its not driver or card issue.
As you can see there is broken light glow around the lighting hammer when im pointing on it with my cursor without the post proccesing. When i turn the option at least on low its all normal again.
It seems that this thing occured in one of recent updates as i dont renember seeing this before and i never had post procesing on even on my 7850 before.