Heads from Skyrim.

By the way, yes, it would be interesting to read about this later.

I'll describe the process more briefly.
The head needs to be processed with the Smooth proxy and Reduce options; the result will be as follows:



The main advantage of this method is its simplicity, but the disadvantage is the increased "roughness" of the eyes. However, you can leave the original Skyrim eyes or just ignore it because it's impossible to examine the head so closely in the game.