3D model done in Zbrush
Render passes with the following materials
Depth Map
In photoshop, blend the layers. (Check https://s-media-cache-ak0.pinimg.com/736x/f5/f6/7b/f5f67b061c102b009083d7eca2f0481c.jpg for details)
Paint over and details
Use the Normal map channels (red blue and green) to mask different faces directions.
Conclusion: This is a very powerfull pipeline, better results come if you spend more time in 3D. Polishing the model and pratice.
