Sony Pictures Classics has bought all North American rights to Charlie Paul’s documentary “For No Good Reason” from Itch Film.“Reason” centers on artist Ralph Steadman and features Johnny Depp observing Steadman’s working process. It’s the feature directorial debut for Paul, a director in advertising and former artist who spent 10 years making “Reason.” The doc is produced by Itch Film’s co-founder Lucy Paul. The Independent Film Co. will begin international sales at the European Film Market in Berlin, which kicks off Feb. 7. Steadman is best known for his illustrations accompanying the writings of the late Hunter S. Thompson. He has also illustrated books on “Alice in Wonderland” and “Animal Farm” and published books on the lives of Sigmund Freud, Leonardo da Vinci and God. The film includes a soundtrack with collaborations from Slash, All American Rejects, Jason Mraz, Lynval Golding, Ed Harcourt, James Blake and Crystal Castles. Sacha Skarbek is the music director.