Layering Lines: Layering good traces at diverse angles can develop a a lot more nuanced gradient. You might start with horizontal strains, then layer with vertical or diagonal traces. The intersection of these strains will By natural means darken the spots in which they cross, developing a gradient effect. https://ink-pen-drawing-technique99876.canariblogs.com/5-tips-about-ink-drawing-for-beginners-you-can-use-today-50949207