Black Squares/Boxes

So Ive played this awsome game for about 3 days now, first 2 working completely fine. Come last night, Ive had a massive issue with black squares seemingly replacing 50% of the textures in game, with all characters being greyed out. I dont 100% know my specs, But I know for certain I got enough to run everything on high settings and easily getting 60 fps. Can anyone help? I beleive theres a file with a photo attached. Im not exactly tech savy but ive tried repairing and uninstalling/reinstalling multiple times and nothings worked.