We finished with The Starlost last night, and I think the best part of the four discs was the seven-minute pitch reel included as an extra on the final disc. It was clearly made before shooting had started, as evidenced by the different name for Keir Dullea’s character and substantially different pilot plot described. They also laud Douglas Trumbull’s Magicam system, which apparently didn’t make it into production (neither did Trumbull), but might have made the miniature sets other than laughable (see the Wikipedia Starlost article for more detail—I’m pretty sure they mean “did not work reliably”).