All the source files for the project I've shared in the making of - https://www.youtube.com/watch?v=P821ywqDQVA
This includes:
Raw mesh in .obj (7 million triangles)
Original sketch in 3D coat v4.26
Lighting and material set up in Keyshot 6.2
Paintover in Photoshop CC
I haven't merged any important layers so it's all pretty easy to understand.
The license deal is standard - as long as you don't resell use it as you like.