Come to the dark side, we have chocolate.
Juan Gutierrez does all kinds of 3D printing art, vacuum forming, and various interesting home manufacturing projects. His latest endeavor was quite tasty looking. He combined 3D printing and Vacuum forming to create a dark chocolate Darth Vader mask. He started with a 3d print, vacuum formed that to make a chocolate mold, then poured some yummy dark chocolate. His end result looks quite appealing.
If you would like to recreate what Juan has done, you can find even more pictures and links to the individual components and equipment you will need on his blog. You might want to poke around a bit while you’re there, he has documented other things like his construction of the vacuum form table as well.