A friend of mine linked me to this video of the initial screen tests of Boba Fett. It was an interesting video, but it reminded me of a book I have in my collection. The Empire Strikes back sketch book, which has concept art from the movie.
I’ve scanned the Boba Fett section so you can see the design iterations. If you’d like to see more, just let me know. The Yoda is quite interesting, he started as a gnome!