This is the shot of Luke’s X-wing floating over the swamp, which they really messed up for the Special Edition. The original shows light filtering through the trees on Dagobah; for the Special Edition, they darkened that light almost to nothing, which not only means you can’t see most of the matte painting, but also makes it look like night above and daytime below (so unless Yoda has a floodlight system installed in the trees, it makes no sense).
Luckily the matte painting is still there, it’s just very dark. I brought the levels back up, but then the X-wing was a bit blown out and needed rotoscoping so it could be brought back down. I ended up writing my own rotoscoping software, because the outline of the X-wing isn’t clear enough for any of the normal solutions to work.
As the work-in-progress had some interesting looking graphics, I thought I’d try and make a little breakdown of it, which is linked at the top.