Hello,
I had this issue too, it was almost like coloured tv static appeared in lines across my game. My game did not used to have this issue!
I fixed it by rolling back my graphics card driver. Just thought I’d leave a note incase anyone else has this issue...
I have an intel core i5-6500 CPU @ 3.20GHz (4 CPUs), ~3.2GHZ with 8 GB ram iMac running win 10 pro 64 on bootcamp, with an AMD Radeon R9 M380 graphics card.
To rollback go to device manager, find the card (mine was under display adapters), double click it, click on driver, then click on roll back.