Triangle Faces Close to Camera

I suspect this bug first began relatively early in the game. I suspect vlad was involved, but it occurred during a teamfight. Essentially, a face passed through almost the entire map (if my camera moved close enough to base, it disappeared). After several minutes, my screen rapidly got increasingly distorted until everything was obscured except for health bars and some particles (second image). Perhaps even more interesting, when I moved the camera close enough to base, the problem ended (last image).