Hatching for Thickness: By hatching (drawing closely spaced parallel traces) in certain areas, you can build the illusion of a thicker line and incorporate texture to the drawing. Hatching is efficient for generating textures such as wood grain, material folds, or simply pores and skin textures. Start out Light, https://inkdrawingforbeginners78901.theideasblog.com/36625504/a-simple-key-for-how-to-draw-with-ink-pens-unveiled