<P> With the commercial and technological success of Who Framed Roger Rabbit and Space Jam, a number of live - action / animated films followed from other studios, including Cool World, and Looney Tunes: Back in Action - though none of them have had any major commercial success equal to Roger Rabbit or Space Jam . </P> <P> 2014's Guardians of the Galaxy had Josh Brolin undertake motion capture for Thanos, but he was uncredited in the film . It is believed that he undertook motion capture again to appear as Thanos in Avengers: Age of Ultron in a post-credits scene, released in 2015 . </P> <P> The combination of live action and animation is very common in TV commercials and TV shows, especially those promoting products appealing to children . </P> <P> With live action and traditional animated films, double - printing two negatives onto the same release print pre-digitally, while complex techniques used optical printers or aerial image animation cameras, which enabled more accurate positioning, and more realism into interaction of actors and ficitonal characters . Often, every frame of the live action film was traced by rotoscoping, so that the animator could add his drawing in the exact position . With the rise of computer animation, combining live action and animation became common . </P>

Which is the only animated pixar movie to include a live action piece