Was Yoda's face modeled after Einstein?

It's uncertain if Stuart Freeborn, the man who developed Yoda's iconic wrinkly, kind face, used Albert Einstein's face as a partial inspiration for the green Jedi master. While it's possible, there doesn't seem to be much direct evidence of this though, and Freeborn is also said to have taken inspiration from other sources.

For example, Freeborn may have used his own likeness as an inspiration for Yoda's round, bald head and kind face. Looking at a side-by-side photo comparison, Yoda does look rather more like Freeborn than Einstein, though the character's large, heavily lidded eyes are similar in shape and character to the famous scientist's eyes.