The more I see of Star Wars from original film sources, the more I think that this warm appearance is the only way that it looks even remotely correct. Applying a natural or cooler color scheme totally destroys this distinctive look to the Tatooine scenes, making them much more generic and uninteresting, even if they can be ‘prettier’ that way. The yellow sand and rocks, the nearly colorless skies, the grain and softer focus all combine to create the feeling of an empty wasteland, which is certainly what they were going for at the time. Later revisions to this look only serve to undermine this aspect of their appearance.