I remember making Darth Vader's TIE fighter and agonizing over the shape. The back half of the model used in the film has a rounded fuselage. To incorporate that into my design meant making the figure much more complicated than I wanted it to be. Yet I wanted accuracy. In the end I decided to keep it simple and elegant. I'm sure the model makers at ILM will forgive me my creative license. (Note to ILM: If you ever decide to start using origami instead of computer graphics or models for special effect shots, give me a call)
Another side note. I met David Prowse (Darth Vader) at the first Star Wars Celebration just before The Phantom Menace opened. I bought him a drink and naturally I made the TIE for him. He loved the figure. I just wish the picture taken of us with it had come out. When I met him again at Celebration IV and told him what had happened, he offered to take another picture to replace it.
This TIE is the prototype for the next generation of TIE fighter. Flown by Darth Vader, Dark Lord of the Sith, it has 4 engines as opposed to two, hyperdrive capability, and angled solar panels which make it more maneuverable than the standard TIE.
Flying this ship, Darth Vader destroyed 6 rebel starfighters attacking the Death Star during the battle of Yavin.