Foggy Weather

Foggy Weather happens with the frequency identical to Thunderstorms which limits the view distance extremely as close as blinding effect making it even dangerous at night where you wouldnt see where that arrow came from or Creeper comes as close as to Explode!! That would add extra difficulty to the game or... instead of making weather based it can be made as a biome like Foggy swamps or forests where there would be constant fog and Danger!!! Also Mobs doesn't burn when they are walking in the Fog during daytime.