Hi H.H.
Stunning work so far. Colours, shades, highlights and textures look great.
If you'd allow a comment I'd have to say the line from the tear duct of his left eye to his left cheek (I mean the figure's left, at the right side in the photo) looks a bit strange. This line does not indicate a specific muscle in the face and it is also not symmetrical with the right side of the face, on which this feature looks more accurate to me. Should still be quite easy to adapt though.
Having said that, still a very well painted face!
Cheers
Adrian