Direct Reference Study - Yoji Shinkawa, Snake

Yoji Shinkawa is a fantastic artist, and if you haven't seen what piece I am recreating, then look at his work right now! His inks show texture, value, and lighting all at the same time. I hope one day to learn even more so I can incorporate it more into my work. Time-lapse on my NG:https://www.newgrounds.com/art/view/deadsm/direct-reference-study-yoji-shinkawa-snake