This one is an icon that was going to be used for a patch of sorts. I have always been a big fan of black and white line work and I thought the "shading" on this turned out pretty well. It was created in Corel Painter with the Scratchboard tool, It didnt need to be too smooth cause the size it was used at was going to be small.
I am going to wait a little while to upvote this post so those who upvote before me can get some more curation rewards. I have been wanting to test that out since I have seen it mentioned a few times.