Some fan art that I made for the Stacks from Ready Player One awhile back :)
Thought I would upload some process images here to detail how it's possible to integrate 3d into your concept art workflows.
Final Image
Rendered Albedo
Ambient Occlusion
Mask - for quick selection in Photoshop
Textures I grabbed from google, quickly mapped them onto the RVs so that wayyy less paint detail would be needed