(https://cdnb3.artstation.com/p/assets/images/images/002/725/575/large/aaron-goodson-render.jpg?1464989786)
Sculpted in ZBrush and rendered in Keyshot.
You can see more of it, including a Keyshot rendered turnaround, here:
https://www.artstation.com/artwork/Ybrkb (https://www.artstation.com/artwork/Ybrkb)