Facial Muscles-Zygomaticus Major

Figure study In Grisaille

This is my 3rd attempt of a figure study In grisaille I used the video by Robert Liberace as an example to follow by, I see many errors In this painting ranging from flat value's to abstract and irregular shapes of the human form. I am taking a small breaking working on some digital concept art for a video, practicing light and form exercise's and will try again possibly this weekend. I know I have an adequate understanding of drawing I just need to translate that to oils and that will take practice and patience. Critiques or suggestions welcome.