Grieg's "In the Hall of the Mountain King" has been staged, animated, and adapted for over a century — from Ibsen's Peer Gynt to countless cartoons and horror shorts. This is that tradition rebuilt with generative AI: a modern adaptation where every frame is synthesized, and the entire film is driven by the music itself. A lone trespasser steps into a living mountain of translucent calcite and wet black stone. As Grieg's theme repeats and accelerates, the world wakes up around him — the walls breathe, ripples cross stone, crystal corridors rearrange, and the pursuit tightens. In the frenzied climax he is drawn into the mountain wall, his body turning to mineral, until the reveal: the mountain was the creature all along. The core idea is synchronization. Rather than cutting picture to a fixed beat, we analyzed the piece's accelerando to build a bar-accurate edit grid, then generated and timed each shot so the visuals escalate exactly with the music — every scene change and the biggest transformations land on the real orchestral hits, all the way to the final chord. Made for the fal × Sequoia 72h Video Hackathon by Lukas Koebis.
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