I took this reference photo on my group hike into the Forbidden Dunes a couple of years ago, Making shadows out of lines can be a bit daunting. I like the scritchy-scratchy grass and weeds – again, sometimes a chore for black and white line.
I decided a thin .01 Micron was good for this. Drawing pressure mushed the tip a bit, so I don’t believe it is a .01 any longer.
Keep safe and reasonably sane, everyone.