High resolution sculpt of an head for a modeling exercise. Base model used from Israeli Civil Guard project sculpted in mudbox rendered in 3Ds Max with Mental ray. Comped in Nuke and Photoshop, wanted to create a face with more character and experience than Israeli Civil Guard project.

Model is about 2 million polys rendered with displacement, normal, bump, spec, diffuse maps at 4k.

Screen grabs from mudbox viewport.

All texture maps used are 4K.
Diffuse map, photo reference was used to paint over UV's.

Texture @ 100%

Spec map, break up reflective oily areas on the face.

Texture @ 100%

Bump map, added for high frequency details like fine wrinkles and pores on the skin, hand painted.

Texture @ 100%

Render passes, separate passes used to create final comp beauty, bounce light, spot light, rim light, ambient light, sss subsurface, diffuse texture, specular, reflection, fresnel, ambient occlusion, rgb channels, eyes channels, blurred reflection and specular mask.

Nuke node tree, all passes put together.