Terrain/Cutoff Fog - making it transition slower?

[Windexglow 10]

I play at 3-5k (3k if I'm in a town) but one thing that has constantly irked me is that flawless view, than a giant cloud of smog at the edge of it.

Would it be possible to have the fog's transition begin sooner (500m?) and end at the appropriate cutoff distance? Sort of acting as a haze, I haven't found any options for this