I was working on a project for a while now, and suddenly, while testing, strange “stringly” circular lines appeared in my viewport and ingame. I have no idea where they came from or what to do with them but I definetely want to remove them. 
Does anyone have any experience with whatever this strange looking “bug” is?
Found the issue. Idiotically enough, I somehow managed to get a copy of the Skysphere into the scene, which overlapped with the previous one, causing weird bleeding.