played for 3 hours tonight and it was dynamic. Fog was there only when it got cloudy and the weather changed. That is what I'm talking about! Had a very long view for most of the game, then it got cloudy and the fog came.
it does make navigation hard. Vets of Chernarus dont really have problems navigating without a map, if I can see landmarks. Fog in its natural pattern would be awesome, mid day fog not so much.