The artistic work is often subdivided, especially on work produced for the larger comic book publishers, with four people typically working on the art: a penciller, an inker, a colorist, and a letterer. Sometimes this combination of four artists is augmented by a fifth, a breakdown artist. However, this generally occurs only when an artist fails to meet a deadline or when a writer, sometimes referred to as a scripter, produces breakdown art. Breakdown art is where the story has been laid out very roughly in pencils to indicate panel layouts and character positions within panels but with no details. Such roughs are sometimes referred to as "layouts."