That’s what they call it these days, right? A speed painting? A color study, a comp, a preliminary drawing or painting, an idea. This is done with Photoshop — no pencils, no paint, no paper or board. “No muss, no fuss” as the commercial used to say. There’s about seven layers in this Photoshop image, so the shadows are on one layer, the background is on another, etc. It’s sheer play.