How do I create Silent Hill style fog with the smoke simulator?

The mist pass was not convincing enough but it will be used with the smoke simulator fog.

This is what I want to create:

Anyone have an example blend file or a step by step tutorial? I tried searching the web but all I found was demo videos with no explanation on how they made the effect.

Any help will be much appreciated.

There is a tutorial out there with exactly this name, made by the famous Gleb Alexandrov:


Some additional info can be found here (also linked in the above article):

LukeV1

Very good tips man!