.uproject import caused flickering textures/materials?

So I came home to work on a project that I had been working on elsewhere and decided to install through git and whatnot, only to come back later after it had finished compiling the shaders to see this horrible glitchy mess.

It seems to have only affected the Sky Sphere and any materials of objects created in the editor while everything else looks just fine. A little side note: even the previews of different things, not just models, have the glitchy texture showing up in the thumbnails too.

I checked similar problems that said it may have been due to occlusion culling but no matter what value I set it to the problem never seemed to go away. I’m sure switching to a newer version of UE4 may help but my team and I are sticking with 4.16.3 for this project so any help would be greatly appreciated!