Richard Miller, my sculpture teacher at Lucasfilm always said – push the clay up, because it comes down anyway.. because of gravity

He also designed Princess Leia’s gold bikini costume. And provided a letter of authenticity when the bikini sold at auction.

A letter of authenticity from designer Richard Miller, of the Star Wars creator George Lucas’s special effects firm Industrial Light and Magic, was included in the sale to an anonymous bidder by the Hollywood auctioneer Profiles in History on 2 October.

https://www.theguardian.com/film/2015/oct/05/princess-leia-gold-bikini-return-of-the-jedi-sells-at-star-wars-memorabilia-auction