I like to use distinct pens for different things. I take advantage of thick markers for giant shadows since they’re massive and chunky and canopy many paper speedily. I like Sharpies for lesser shadows and thick continuous lines. Inks like oxgall (produced from oak galls) and bistre (made out https://howtodrawwithinkpens76543.blogdon.net/ink-pen-drawing-techniques-an-overview-50945734