We've seen a lot of early concept art for George Lucas' Star Wars that had very different designs than what they ended up using in the films. I've never seen any photos of these designs brought to life in costume form, though! Here's an awesome photo of Anthony Daniels trying on an early prototype costume for C3PO. I've also included some concept art of the costume he's wearing. I've also included one of Darth Vader. Until today I didn't realize that these designs actually went into the costume development stage, so I thought these were incredibly cool. Finding stuff like this makes me happy.