Sam Nielson's Fundamentals of Lighting

I finally made it through the final assignment of Sam Nielson's Fundamentals of Lighting course!
This image was a big step for me, as I don't usually do 2D art. I very much recommend this course to anyone that likes to paint, including fellow hand-painted texture artists!
Note that the line art was provided by Sam Nielson himself; the assignment was to render the image with color and light.
https://www.artstation.com/artsammich