RE: Why the original starfield in the SE and not the 1981, since it is the 1981 crawl: They went back to the original starfield because they re-comped the elements for the SE to get rid of dupe grain and matte lines. It's hard to say if they intentionally bypassed the 1981 starfield, or if they even knew about it since it might not have even been saved. They probably found a box of BG plates, one said it was for the opening flyover, and that's the one they used when they re-composited it.