Painting with actual paint is a terrifying prospect for a digital artist because there's no undo. Once you've laid down some paint, if it got worse, there's no going back. I did previously draw and paint with actual things (gooey pigments of some sort), but not having multiple save files, layers, and quick colour changes was really bothersome. Casper, however, loves painting with a brush, even if it's possibly not his own, and Logan loves being painted. He's a renaissance potato.