These ones, and the way you can just break off values by adding these in. Need to learn how to spread out crosshatching like this too since I end up using it almost everywhere just to fill a space rather than defining a form.
These are the kind of work I used to do 8-10 years ago lol, first two are uni homework, 3rd’s one of my first gigs, 4th one’s also while I was in uni, but did it as a personal work for portfolio. Now everything is just characters floating in a white void haha.