Good weather mod, nice improvement. I once saw a race at Spa in heavy fog but actually I couldn't see the cars anymore from the side of the track, it was so dense. It is not unrealistic, especially during endurance races at racetracks in the hills. What we now need is sudden rise and retreat of mist banks, but I guess that's too much to ask for? You've got skill and insight for (weather) modding, keep evolving.