Got a few crits Enix..
Eyeball's are way to white, try to mix it with the skin
Eyebrows to gray, also try to make them from small pieces of hair in 2 to 3 directions
Light the nose a bit to bring the front bone out
Bring the face tone color a bit more darker and add more shadows i.e, he has a helmet, mouth system, try to profit of it and perform more shadows in that area to bring the face skeleton more in evidence.
And the last one try to use a more reall skin color.
edit.
Regarding the helmet design I don't know this, I'm sure is not textured yet but if it is then right now it looks to much with plastc, 70% plastic 35% labor, 5% metal. Try to use more sharp ligheted colors.
the shadows from eyes area looks fine
keep it up
Eyeball's are way to white, try to mix it with the skin
Eyebrows to gray, also try to make them from small pieces of hair in 2 to 3 directions
Light the nose a bit to bring the front bone out
Bring the face tone color a bit more darker and add more shadows i.e, he has a helmet, mouth system, try to profit of it and perform more shadows in that area to bring the face skeleton more in evidence.
And the last one try to use a more reall skin color.
edit.
Regarding the helmet design I don't know this, I'm sure is not textured yet but if it is then right now it looks to much with plastc, 70% plastic 35% labor, 5% metal. Try to use more sharp ligheted colors.
the shadows from eyes area looks fine
keep it up