Experimenting with the Corona Volumetric material and an HDRI & Backplate combo. The fog is controlled using a Corona distance map linked to the shadow catcher ground plane with the fog scattering colour controlled using a standard Noise map. I purposefully didn't add any extra fog in post. I'm pleased with the effect I was able to create but feel that it works best with very low angle shots

Porsche 911 model - Evermotion

HDRI and Backplates - CTC Creative Studio https://gumroad.com/ctc