I'm a follower of Berkey's works, and while you can find this illustration everywhere marked as "concept art for the Axiom from Pixar's WALL-E", John Berkey had nothing to do with the movie. It's neither concept art nor official art from Pixar. It was painted in the seventies in one of Berkey's most prolific stints for scifi book covers. Thus, I'm removing the Pixar related tags and adding science_fiction.