Most if not all of Bob Dylan’s “Asia Series” paintings are based on identifiable photographs not of Dylan’s making — none of them recent, but at least some of which remain under copyright protection. I consider it perfectly reasonable to hold him accountable, as a visual artist, to the same strictures his attorneys would hold anyone who produced and marketed an interpretation of his work. In what ways are graphic artists allowed to respond to photographs — and, conversely, disallowed from responding to them — both legally and ethically? […]