Originally this was a sculpt I attempted with the Keentools addon for creating a base in blender (link below)
https://keentools.io/download/facebuilder-for-blender
As I approached the high res sculpt I came across the R3DS WRAP pipeline and attempted to wrap it around my sculpt.
A really helpful one from most of the ones i watched online was by Nirmalendu Paul (link below)
https://www.artstation.com/artwork/YaoReY
Base textures were done via a head scan (link below)
https://www.3dscanstore.com/blog/Free-3D-Head-Model
This was my first ever attempt on hair and it was completely done in blender.
The sculpt details such as old wrinkles, etc were added as overlay and masked on top of the normal map in photoshop.
The beard and scalp hair texture were added in substance painter.