Ran a few screenshots through ChatGPT and
you can also see signs of digital rendering in the arches themselves. Around the 4-second mark, part of the coloured bands looks slightly pixelated, and the gradient at the top of the arches isn’t a single solid colour. It breaks up in patches, like a compressed or unfinished digital texture. Real painted panels or LED lighting wouldn’t do that — the colour would appear smooth and continuous.
That, combined with the inconsistent blur and the cooler lighting on Mel earlier in the sequence, pretty much confirms it’s a digital or composited setup rather than a physical tunnel.
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The blue “eye” background looks digital too. Mel’s lighting is completely neutral and doesn’t pick up any blue reflection from the wall behind her. The background itself stays perfectly even with no texture or shadowing, which wouldn’t happen with real light. You can also see faint halos around her hairline, suggesting she was keyed onto a digital background rather than standing in front of a physical one.
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