Made with Blender, Zbrush and Photoshop using The Rock Essentials and Pro Lighting: Skies From Blender Guru.

Check out the rock essentials for Blender:
https://www.blenderguru.com/product/rock-essentials/

Check Out Pro Lighting: Skies for Blender:
https://www.blenderguru.com/product/pro-lighting-skies/

All critiques and tips are welcome, and encouraged.