After setting up his own animation studio in Madrid, Spain, director Sergio Pablos, who had worked on Disney Renaissance films such as The Hunchback of Notre Dame, Hercules, and Tarzan, decided to develop a new traditionally-animated feature film. Pablos wanted to explore how the medium would have evolved had western animation film studios not switched to producing mostly computer animated films since the 1990s. For the film's look, the studio sought to overcome some of the technical limitations that traditional animation had, focusing on organic and volumetric lighting and texturing to give a film a unique look, while maintaining a hand-crafted feel.