In 1937, Leon Schlesinger Productions contracted Iwerks to produce four "Looney Tunes" shorts starring Porky Pig and Gabby Goat. Iwerks directed the first two shorts, while former Schlesinger animator Robert Clampett was promoted to director and helmed the other two shorts before he and his unit returned to the main Schlesinger lot. Iwerks then did contract work for Screen Gems (then Columbia Pictures' cartoon division) where he was the director of several of the "Color Rhapsodies" shorts before returning to work for Disney in 1940.