I'm sure this one has come up before, but I have a HB complaining about the 'similar' backgrounds in AS15-82-11082 and AS15-82-11057.
What is the HB's problem with the backgrounds, exactly? "Similar"? They are the same hills! If he/she thinks they are a painted backdrop, then why aren't they identical, rather than just similar? If they are not, in fact, real, distant, three-dimensional hills, then why does a comparison of the two images show changes in perspective, with the ridge lines hiding portions of the hill behind? (Look particularly at the "notch" at the lowest point of the "skyline".)
(Note, brightness and contrast adjusted to show detail better)
Surely photos like these, showing the same backgrounds from different vantage points, are some of the best proof that they were taken in a real, vast, three-dimensional landscape?