The cylinder bridges flat planes and curved surfaces, making it one of the most useful shape primitives for studying ellipses, perspective, and light wrapping around form. Those same principles carry directly into drawing arms, legs, fingers, and other organic shapes.

Where the sphere’s terminator curves in every direction, the cylinder’s runs as a straight stripe down its length, so the core shadow reads as a clean vertical band. It’s the easiest place to see how shadows behave before tackling forms that twist and taper.

The scene loads with a green light to set the mood, but switch it to white whenever you want a neutral setup for a pure value study.

Keep the round base, lose the flat top, and the cylinder sharpens into something new. The Cone Shading Reference picks up right at that point.