You may not have heard of Kashyyyk, but you certainly know some of its denizens. Kashyyyk is the famed planet of the wookiees in the Star Wars universe, the homeworld of Chewbacca. We'll finally get a chance to see Kashyyyk in the upcoming movie Star Wars: Episode III - Revenge of the Sith, and we'll also get a chance to actually explore Kashyyyk in Star Wars Galaxies: Episode III Rage of the Wookiees, the upcoming expansion pack to the Star Wars online role-playing game. The developers at Sony Online Entertainment have been hard at work on the expansion, and concept artist Arnie Jourgenson was kind enough to write this edition of our designer diaries to explain just how they're translating the wookiee planet we'll see on the movie screen to a 3D world we can explore on our computers. He even shared some concept art from Episode III.