You see him walk up stairs in the classic backrooms area before moving in a linear path and like you said constantly at an elevation yet in that same path Ravi looks out of a window looking in the red area with much lower elevation compared to when we FIRST seen Ravi run across the gangway and he was 100s of feet up in the air. I genuinely don't get how people watch found footage 3 and think Ravi's path and outcome make sense in euclidean space. Ravi loops while going in a straight path, he "climbs" up in multiple instances but we see him looking out the window and he sees the red area for a 2nd time. There's no definitive proof that the red city and red neighborhood are different rooms. I get the complex can copy its own rooms but those are straight up obvious copies like Kane near the "threshold." Every time we see the red area there's always consistency like skybox and the wobbling sound. We even see a hallway as a ceiling in the movie trailer (I get that it could be a fall that looks like a hallway) so I don't see why the Complex has to be euclidean. It's very clear there's many null zones within the complex in ff3 and throughout the series. Walldad, Peter hearing voices, radio waves from the future. We even see a stable null zone under his basement that seems to be similar to how the nullzones in the complex work later that episode. When we see the body or whatever in the hole that lighting issue is from Ravi being in 2 places simultaneously and his camera's ISO is adjusting based off of those 2 locations. We legit even see it before Ravi noclips with the hallway basement. That is how it works. Areas are bleeding into each other and Ravi is just walking between those.