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Kaia falls through a gym floor and lands in the Backrooms. Yellow rooms, damp carpet, fluorescent buzz — she knows the drill. But something else is off. Walls shimmer at their edges. Rooms flicker like textures loading. A corridor she walked through five minutes ago has fresh drywall that wasn't there before. She meets Drew, a kid who's figured out what nobody on the wiki ever documented: the Backrooms aren't pre-built. They render in real time, generating new geometry just ahead of wherever you're walking. Usually faster than you can move. Usually. Past the render line, the architecture falls apart — walls that don't connect, carpet that drops into void, entities with geometry that didn't finish loading. What happens when you walk faster than reality can build itself? Backrooms horror that breaks the world down to its scaffolding.