I used some hand (vr) sculpted elements with the Steam Punk 3D kit I picked up last year. I set up the scene in Tiltbrush and exported to marmoset for the render. The rest was done in Post processing (affinity photo).
With a significant amount of Post processing to bring out the dynamic composition.
Scene was set up with lighting in Marmoset. This is a render capture straight out of Marmoset.