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What are you are really trying to do is induce several emotions at once from your audience.
#1. You are trying to evoke a feeling of total isolation as if you were stuck in the back rooms of an infinite space that looks like what is in your images. Never show the outside, and if you do make sure it's generic. Never show good lines or identifiable pathways, just the spaces themselves. Never really identify when or where, any good liminal space photo should be impossible to find the location of because it exists in the aether, a parallel dimension, not your local shopping mall or community college.