For some reason my game has begun to have these odd squares and triangles appear all over the screen. They are usually black colored and all across the map. They get bigger as I zoom out. I'm unsure if those are a setting but I tried to turn up all graphics and it did nothing. All the graphics are distorted on the map and when talking to leaders. But they go away for a second when events occur like techs and founding cities. The grass grew giant once and idk why but these large stretchy lines appear too. I've never used mods or anything that could harm the game. In fact I don't even play civ IV much since I have Civ V. So wondering if I should just uninstall the game or if there's a simpler solution to this issue.