I was testing the Face app mobile program... And I'm learning to do things with it that are quite good for my taste. I used a render of Vincent G8 as a base and another of Kibo G8.1 as a secondary and I made a change of face with the two bases. The result is very good almost that of a real photo. Also with the Face App program I put the smile. Face app is based on AI and I guess that's why it has this result.
https://www.renderhub.com/bu-es/vincent-for-g8-male
https://www.renderhub.com/bu-es/kibo-for-g8-1