How to draw a cylinder
The most important thing in the cylinder is to express the 4 levels of light. In other words, the more natural and realistic the expression of the four stages of reflected light, mid-tone, darkest tone, bright tone, and mid-tone from the far inside with sunlight is achieved. Tone steps are easier and more concise than circles, and by drawing these steps, you can show a sense of expansion. Shadows form at the beginning of the dark stream and dissipate as they move away.
To draw a cylinder, first draw three vertical lines. In my case, I started with a 2B pencil. And then draw the top of a cylinder to measure from the cross like like below.
And then like above, you can express the gradient with 4 level's tons. From reflected to medium ton. (Reflected light--> medium-->dark-->bright-->medium)
And then erase the line, where it gets off the outlines. Next, you can draw the short horizontal line to express the expanded round shape for the dimension.
Here is the applied cylinder sketch.
Myungja Anna Koh