Amblimation was the animation production arm of Steven Spielberg's Amblin Entertainment. The studio was shut down in 1997 and some of the Amblimation staff went on to join DreamWorks Animation.  It was known for its quieter atmosphere, more subdued acting, and more atmospheric pace compared to a great deal of American animated films; these qualities usually led to underperformance at American box offices and may have factored in the decision to close the studio down. The company's mascot, Fievel Mousekewitz (An American Tail), appears in its production logo. A project to adapt the 1981 Andrew Lloyd Webber musical Cats was in the making, as well as a Roger Rabbit prequel film titled "Who Discovered Roger Rabbit" with a sequel to the original called "Where is Roger Rabbit" but were all abandoned with the studio's closure.