So that’s an “Alien head” model in traditional “Green” 
Here’s it’s lowpoly model optimized in Cinema4D
[attach=66908]c4dmodelretopolowqt9.jpg[/attach]
Sculpted and textured in ZBrush 3

And finally rendered in Cinema4D:
[attach=66909]alienheadc4drenderlowvk5.jpg[/attach]
C’n’C are welcome! 
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