I downloaded a few photos of women’s faces from Pixabay and Unsplash, set them to grayscale, applied the gaussian blur filter, and then posterized the image down to 2 values: black and white.

I used these notans to paint.

The top-most picture was done on wood covered with gesso painted with an old brush (hence, the ridges.) Some folks say to sand your gesso application, but I didn’t want to hassle with that. Below is a comparison between the actual notan (posterized photo) on the computer screen, and my painted image on the right. Close but not exact.