great would be a future solution, to use Volumetric Light/Fog System with different, variable Density, moving speed and moving direction as built in extended feature of the already built in “Volumetric Fog” in the Unreal Engine.
Also the possibility to use random values (lower limit, max limit) would be very great.
I did dig the marketplace, Forum and Youtube, to show examples about it.
These links came close to it:
“Volumetric Fog and Lighting in Unreal Engine 4 | GDC 2018 | Unreal Engine”
Please, do let me know.