PrettyPotato

I've been playing Arma 3 fine but recently my game started having these Terrain issues. I don't really know what they are or how to fix it and i tried to look for it somewhere else but couldn't find someone with the same problem. https://gyazo.com/1d525042839229882e872bc5b383818f - A picture of the issue. Please help I do not know how to fix this.