Based on a sketch by Yigit Koroglu
Check out his work here https://www.artstation.com/artwork/a8naX
There a lot of redoing and learning with this one. At first I didn't want to texture it at all, then I decided to go with fully procedural materials which were pretty cool and I still ended up UVing and texturing most of it.
During the initial beginning stages I wanted the driver to be a WWI fighter pilot, leather helmet, big goggles etc, after a couple of experiments with that I stumbled upon this design and I fairly liked it.
Driver character was done in Marvelous designer / Zbrush / Blender, some texturing was done in Quixel.