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Continue to ChatIt was actually quite difficult to find environments that felt like they were underground, that didn't have a lot of doors, that didn't have a lot of windows and a lot of vents and things like that, and this felt like it could be underground with the supports and the vaults and all of that. - Francis Lawrence from https://whatsmyquote.com/quote/it-was-actually-quite-difficult-to-find-environments-that-felt-like-they-were-underground-that-didn-t-have-a