"We never know where the story will go but we just keep working on the film as it develops," he said.In each of his films, Miyazaki has employed traditional animation methods, drawing each frame by hand; computer-generated imagery has been employed in several of his later films, beginning with "Princess Mononoke", to "enrich the visual look", though he ensures that each film can "retain the right ratio between working by hand and computer ... and still be able to call my films 2D".