Following Kubrick's death in 1999, Spielberg took the various drafts and notes left by Kubrick and his writers and composed a new screenplay based on an earlier 90-page story treatment by Ian Watson written under Kubrick's supervision and according to Kubrick's specifications. In association with what remained of Kubrick's production unit, he directed the movie "A.I. Artificial Intelligence" (2001) which was produced by Kubrick's longtime producer (and brother-in-law) Jan Harlan. Sets, costumes, and art direction were based on the works of conceptual artist Chris Baker, who had also done much of his work under Kubrick's supervision.