Sorry, I didn't mean to sound so defensive. But I'm just not seeing it. The Tatooine matte doesn't seem any different from the original and I don't see any green blob in the scene you mention, it looks exactly the same as the original to me (save for the stronger saturation, which is present throughout the whole edit, because GOUT is very undersaturated).

Here are both shots in comparison:

I really don't see much difference. The matte painting is definitely the same as the original and I don't see any green area in the other shot. Or did you mean a different one?