Draw constructions in shadows with thicker lines, and structures in light with thinner traces. Test it your self: draw a circle, then go around the bottom of it with a heavier line and instantly it gains volume and appears like a ball. On top of that, be aware of https://ink-drawing-for-beginners05936.sharebyblog.com/36773559/the-smart-trick-of-ink-pen-drawing-techniques-that-no-one-is-discussing