Alien Guy (collaboration)

I am running, with a dear friend of mine, a side project during spare time. It is about gamedev stuff and we needed an alien guy, so he blocked out the concept and sculpted the mesh. I then continued with retopolgy, normal baking and rigging. Next I textured, shaded, lighted and rendered this not so friendly fellow.

You can see his work here: https://www.artstation.com/artwork/lV3mbe

EDIT:
You can discover more about the project where this model has been used here: https://iranon.itch.io/set-the-world-on-fire