I was playing in official server 0030|North America - NA, me and a friend I met along the way were walking through Cherno when we noticed what looked like almost a massive smoke or dust cloud by the plane crash, we thought nothing of it at first, until we walked into it and it actively disrubted our vision and if we looked at it a certain way would even turn the whole skybox a blinding white, after we left Cherno you could clearly see it from a distance, it looked like a dome of three or more layers of smoke/dust swirling in alternating directions that covered the majority of the city.

The reason I labelled it as potential cheat is because as we were leaving Cherno somebody was shooting at us and as we sat inside a building to see if we could see who it was, it looked as though the smoke/dust cloud was moving as the person chasing us was moving, although I could be wrong.