I'm reminded of the Texture section of Draw-A-Box. The first exercises are texture maps of paper. He really drives home the idea that texture is primarily the result of cast shadows on neighbouring forms. So understand those and you understand the texture. Then you just draw the cast shadows of forms on form. The map is a neat tool as well because your start in full shadow and move towards full light and so your use of drawing texture really only in areas of half-tone is much the same. The darkest parts of texture are hidden in full core shadow, perhaps only whispers are visible in area of reflected light, while the full light eliminates any cast shadows. Where we see some texture in lit areas has more to do with the orientations of the forms themselves and occlusion. The hood of the cape looks like a textured wool fleece, the tight curls of which create little points of value due to occlusion. There is also the neat patterning of the light that passes through the material in the cast shadow areas. Would you consider that texture or more do do with light and shadow mapping?

A textured brush could help to get some noisy value distribution into the fabric of the hood. No reason just to stick to a round brush when rendering, is there? Or is the whole thing meant as a sketch/map to prepare for a rendering?

This was fun to draw along with. I’ll have to remain careful to not over-detail the texture. Something I continue to see as a need in my toolkit is a better understanding of surface structure/plane changes/contour lines. Does anyone have a pointer to a particular exercise or lesson (probably outside this course) to help with that?