In an obituary for Stuart Freeborn, Irvin Kershner notes that Freeborn "quite literally put himself into Yoda, as the Jedi master's inquisitive and mischievous elfin features had more than a passing resemblance to Freeborn himself," as well as LucasFilm noting that Yoda's looks were partly inspired by Albert Einstein.
"Stuart Freeborn, Yoda's maker, dies," The Guardian, February 7, 2013, accessed November 28, 2022
He will likely be best remembered for his work on Star Wars creating characters such as the 7ft tall wookie Chewbacca and the slug-like Jabba the Hutt.
LucasFilm said Irvin Kershner, who directed The Empire Strikes Back, would "note that Freeborn quite literally put himself into Yoda, as the Jedi master's inquisitive and mischievous elfin features had more than a passing resemblance to Freeborn himself". Yoda's looks were also said to be partly inspired by Albert Einstein.