nose painting tutorial
eyes, eyes, eyes..
"Eye are one of my favorite part of the body to see the depth brought out in a sketch." The eye, the part of the body that conveys most emotion and expression, represented in a sketch.
i would try this, but with charcole pencils instead.
A Beautiful Short Film Imagines M.C. Escher's Workspace - Kasia Cieplak-Mayr von Baldegg - The Atlantic