I did this in Affinity Photo on my iPad Pro 9.7 inch using an Apple Pencil. I wanted to see if I could emulate the look of Degas’s landscape monotypes done with oil paint on a copper plate. Affinity Photo has a wide variety of excellent brushes. I used one of the Etching brushes, one of the Texture brushes, and one of the Oil brushes and switched back and forth between black and the light cream color I used for the background. Done from imagination.
iPad Pro 9.7 inch and Apple Pencil, Affinity Photo app.