The artist will generally have some uncertainty as to the shape of the splayed brush/rag, so the splotches that are applied will have a level of indeterminacy. Subsequent splotches after an initial splotch might be similar to the initial splotch, and rhythm can be created with this repetition. By turning the rag or re-splaying the brush, an artist can remove him/herself from purely intentional mark making, moving toward the accidental.
Featured: Madame Vuillard Sewing by Édouard Vuillard.