Warm-ups and scales
50 straight lines
50 ellipses of varying minor axes
7-step value scale in #2 pencil
7-step value scale in single color (marker)
7-step value scale with a pen (hatching)
5 distinct line weights with #2 pencil
5 distinct line weights in pen
5 distinct line weights with marker
Draw linework for a
Rounded rectangular prism
Vertical cylinder
Horizontal cylinder
Render
Pick one of the above to shade in a single color using marker