I tried out a different techniques in some mini sketches.That is, just focusing on tones, and not intentionally drawing any lines at all. They are all just a series of squiggles.
This is just a doodle of different methods of stippling and shading. The building on the right is just a series of loose, almost dotted, rectangles, where the pen just touches the page about half the time, like a jackhammer. So most of the lines end up being vertical, but with no rhyme or reason to them, unlike traditional cross hatching. I quite like the feeling of unreality that this technique creates in a sketch.
Seal on the path up to Castlepoint Lighthouse, North Island, New Zealand