These are some of my contract work for Radical Convergence in contribution to Digital Humans: https://www.radicalconvergence.com/digital-humans
Breakdown: I used Zbrush to fix scans or sculpt heads from scratchbased on reference. We use TextureXYZ, Photoshop for fixing, correcting and creating textures. Maya Interactive Grooming for any type of hair. Arnold for rendering.