To capture the enormous trees of Kashyyyk, the sinkhole cities of Utapau, or the lava rivers of Mustafar on HD, George Lucas could not rely on exotic locales on this planet. Instead, he tasked the Model Shop at Industrial Light & Magic to create these new worlds for Episode III. The results are some of the largest, most intricate miniatures ever constructed for a Star Wars film. Here's a tour of these new planets-in-the-making, featuring exclusive test footage of Mustafar's lava flows in action.

Video, audio and stills of the "Making Episode III" documentary series are copyright © 2005 Lucasfilm Ltd. and may not be reproduced or reposted in any form or medium.