Sometimes this can be caused by depth-of-field when some parts of the scene are blurred which causes weird edges on some assets. Happens to me in Metal Gear Solid V. Just disable depth-of-field.
I had the same in GTA and it drove me mad!!Found out that i had to turn up everything related to shadows.Somehow it lagged my game on my 4690 but its now playable on my i5 8600k.This crap bugged me for almost 2 years