The highest-grossing movie of all time is again the subject of a copyright legal battle. Artist William Roger Dean filed a complaint against James Cameron and 20th Century Fox on Thursday seeking more than $50 million in damages over Avatar. Unlike past Avatar plaintiffs, Dean has an established pedigree. He is a well known artist who has created album covers for such big-selling bands as Yes and Asia and exhibited his fantasy landscapes and other work around the world. In fact, it is the ubiquity of his work, as well as a movie proposal based on it that he took at the 2005 Cannes Film Fest, that has Dean convinced the look of the 2009 3D sci-fi film were derived from his images. “The similarities of each such work are substantial, continuing, and direct so as to rule out any accidental copying or similarity in scenes common to the genre. The infringing portions of Avatar are so similar to Plaintiffs Works that Defendants and others employed in the preparation of the film must have had access to the Plaintiffs Works,” says his 17-page complaint (read it here) filed June 27 in U.S District Court in New York. The filing cites numerous specific examples from the world of Pandora to the foliage and creatures that populate it where Dean sees his own work. Along with copyright infringement, Dean also is claiming contributory infringement, breach of implied contact, unfair competition and unjust enrichment.