Acorn, cattail & hairy stem drawing - ©Heeyoung Kim
Drawing hairy subjects with pencil is quite challenging, because it gets darker and darker as the pencil strokes are repeated.
What is the solution?
Do not draw!
I started with simple lines. Then, I had to think in a completely reversed way. I mean, I started shadowing the first lines instead of drawing more lines. At first it didn't look right, but with erasing and shadowing repeated, I finally could have the hairy effect.
For the acorn, I had relatively big black negative space under each hair. Then I divided the space into a couple of more hairs, again by shadowing, not drawing.