I really love this character and I tried different lighting.
Head sculpt process
https://cdna.artstation.com/p/assets/images/images/012/245/680/original/niyazi-selimoglu-process.gif?1533799281
This character is not 3dscan . Sometimes I look at scanned models that fit in the concept for main pose and anatomy reference, that's all.
Hope you like it.