Layering Lines: Layering good strains at unique angles can make a a lot more nuanced gradient. You may start out with horizontal lines, then layer with vertical or diagonal lines. The intersection of such traces will Normally darken the regions wherever they cross, creating a gradient effect. Scribble Drawing: https://trevorskzmb.dbblog.net/9358401/ink-pen-drawing-techniques-things-to-know-before-you-buy