I`ve found that portrait likeness is the hardest part of this exercise.
Since I have no opportunity to set up mirror and lamp in my work-flow in one time, I decided to go wit the window light. I made a little aperture in the curtains to get light come straight from the left side.
So, the MASS LIGHT hits all left side of the face and a little bit of right cheek. And here we get the first trouble - you should know the planes of the face very well. So I have to spent a couple of hours trying to understand this geometrical hell on my face.
MASS SHADOW takes all the right side. And it`s a pleasure, because you don`t need all those detailing in shadow zone. Shadow makes you think about economy.
HALFTONE - well, there is pretty gentle transitions, so I let the soft brush do this work for me
HIGHLIGHTS - they are everywhere! I must be proud, because my hair reflects light so intense =) And I get this pretty rim light on the left border and the tip of the nose.
REFLECTED LIGHT - hair, chin, cheek and clothes. I think reflected light in this picture very subtle because of black clothes and dark wall behind me - light absorbs much more than reflects.
CORE SHADOW - eye corners, nostrils and a gap between lips
CAST SHADOW from nose and surprisingly from eyelashes and eyelids and lower lip.
fabulous job on the face and lighting. the grainy surface texture is also nice. great mood and excellent work capturing the moment...which is really the hardest part, even beyond getting likeness.
The neck feels a little guesstimated and the marks could be simplified or cleaned up so there is not a feeling of overworking that area. It just seems a little bit muddled. A little more care on the shirt/bust area would also help bring up the quality.