Here are a couple of drawings/sketches by Kevin Nowlan from the presentation he did with Soltero at SDCC 2015. He is well respected, not only by fans, but from fellow professionals. He also won the Inkpot award this year at Comic-Con International. Congrats to Kevin and his family.
"We were talking about lighting a figure, rim lights, the anatomy figure loaned to us by Anatomy Tools. These images are about the size of large index cards--5x7 or so." ES