Those wonderfull and accurate 3d Photo are made by :

Maya AutoDesk ?Maya® is a 3D animation, modeling, simulation, and rendering software provides an integrated, powerful toolset. Use it for animation, environments, motion graphics, virtual reality, and character creation. 

Mudbox ?Mudbox digital painting and digital sculpting software enables you to create production-ready 3D digital artwork. Mudbox offers a high-performance environment and professional-quality tools to help you create highly realistic 3D characters, engaging environments, detailed props, and compelling concept designs in less time.  

Realistic Human Head study:

         - those shots are after moduling phase from different light positions:

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          - Those are the final rendering phase from different light positions:

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