I tried to play with the values of the fog effect until I was happy with the result.
I added these lines at the end of the track.ini file of Monza 10k, my test track.
[ fog ]
type = 1
density = 1.5
fog_r = 165
fog_g = 200
fog_b = 250
The result is reduced saturation in the distance with some shift in hue towards blue. The thing I wanted to get (screenshot attached).
It's really good for tracks like Monza 10k, where you don't have important horizon textures with lots of details, because that's the drawback: This change affects all textures, the horizon textures nearly disappear.
And here's my question: Is there a way to exclude the horizon textures from this fog effect or is there another way to create this effect?