I find this shit fascinating. Also, I really think the “old school” method looks better than a lot of the the CG being done these days. Models look more 3D because they are 3D in real space, not created in a computer.
Of course, I also still often write with a pen or pencil on actual paper, so what do I know? Well, something at least. I know what I like.
Anyway, check out this great video and learn all about stop motion, blue screen and more of the tricks of the trade that helped make Star Wars, Empire and Return of the Jedi the classic movies they are.