*Wizened Jedi Master Yoda discusses the Force with his guest, Luke Skywalker. An original production painting by Ralph McQuarrie.
Left: Puppeteer Frank Oz prepares his little alter-ego for the cameras. Oz also provided Yoda's voice.
Right: An early development sketch of Yoda, looking very elf-like, by Ralph McQuarrie. *Source: Back of card.