I’ve always had a problem with the “over-yellow” tatooine corrections that have been done previously. It just always looked so unnatural that I couldn’t fathom it was intentionally on the original film; yet it looks completely natural on the print photos and the mverta screening pics. I think because, in trying to replicate the look, an unintentional side effect is that skintones become jaundice-y, the whites of artoo turn into a milky yellow, and the silver turns green. However, on the photos of the print and the Mverta screening photos, it takes on this yellow look without the unsightly side effects. Skies still look blue, whites are still white, and skintones are still skintones. It’s gorgeous, really. I wonder why it’s so hard to replicate without the unsightly side effects.
I think one of the reasons, for the Blu-ray at least, is that the yellow/blue channel is so deteriorated that the information just isn’t there to make the correction. The Blu-ray masks the blue deficiency by giving everything a blue cast, thus making the skin tones purple in the process. This is also noticeable in the clothes. Often the costumes will be blue/white, rather than their original off-white or tan, and it’s impossible to completely recover this without ruining the highlights.