One thing that I've tried to point out earlier in this thread is that the wide-shot of the binary sunset wasn't only re-timed in '97, and getting clouds in '04, it was also digitally re-composited in '97, an easy way to spot this is on the different shape of the real on-location sun.

In the original film the red sun was composited into the shot and can actually be seen moving (setting) as Luke walking up to the edge. In the SE where both suns are "digital", you can see that both of them are moving (setting). This is actually hard to see if you're watching the film as you're supposed to, but if you are jumping between the first and last frame it's very visible. Just thought I would point that out as I am still not seeing any description for it.