Hi, here is my overpaint suggestion how to move the portrait further. What you have now is a good base to start "sculpting" with light and color. Things I have done: Made the eye a bit bigger, added definition to planes of the eye, also white of the eye is never white, same for the teeth. Made the value for the vest darker, so it won't compete with the skin Played around with skin hue shift, local color and subsurface scattering Oveall strenghten the light source intensit and added highlights During my painting process I tend to get rid of lines as they flatten the image. You could add some lines later. Indicate more volume for spherical and cylindrical forms: arms and head. Hope it will give you some directions, keep up the good work!
This is a great help to my project. Thank you so much. I really struggle with color, and what you described, as well as the redraw above, is very helpful.