Re: Star Wars Episode VII
It's not a law that they HAVE to shoot Tatooine only in Tunisia. Abu has a more painted, dramatic look...maybe the director wanted a more romantic vision? Or maybe it's a different region of the planet we haven't seen before? Whatever the reason, I'd bet it's Tatooine. Mostly because, unless they intend to tint the dunes purple ala Star Trek V, prety much EVERY moviegoer is going to associate sand dunes with "that desert planet Luke is from". We may be nerds, but to a large portion of the audience, a new desert planet would be confusing.
If I remember correctly, didn't they do pickup shots for ANH in Death Valley?