Black flashing squares.

Hello folks,

I have a slight issue whilst playing in certain areas, basically flashing black squares appear all over the screen. It's not constant and only seems to last a minute or two but was wondering if anyone as encountered these before. I've done some research and one possibly linked it to a graphical twitch with the changing of the weather in game but can't be sure.

If you have any idea I'd appreciate the help.
Thanks.

*Update*
I think I fixed this issue. It looks like it was related to a driver issue, I re-installed the drivers and haven't come across the flashing black squares since. Hope it's fixed it for good.