https://gamesartist.co.uk/biker/
Character Artist Magno Coutinho provides a breakdown, developing a Biker character. In this article, Magno talks about, goals, tools, design, blockout, high & lowpoly, texturing techniques, badges & tattoos, lighting & rendering.
https://www.artstation.com/magnocoutinho
https://www.artstation.com/artwork/Ge0LLV