I'm going to post something very interesting that I've found. I'm sure you are aware that masons put hidden messages in movies. I think that Interstellar was a metaphor for Inside Out Earth Theory ex.
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https://www.youtube.com/watch?v=Ln2SGm9gEuELooks like they are orbiting a spherical cosmos inside the Earth.
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https://www.youtube.com/watch?v=LRT0GGTWYnMCooper wakes up, he goes near the window, but he can't see what's past it because it's hidden behind a white curtain (which represents light imo.). What happens when he puts curtain aside? CONCAVE HORIZON is showing.
