Marble Chime
Real physics is the instrument. Each glass marble is a rigidbody with continuous collision detection rolling down four zigzag ramps whose colliders are placed at runtime from the Blender ramp nodes — oriented boxes with rail guards and end walls, solver iterations raised for small fast bodies. Every board contact plays a tuned sampled celesta note (a falling scale, top ramp to bottom), end-wall bumps tick a woodblock, and the brass bell — hung on a real hinge pivot from its bracket — swings and rings a tubular bell when the marble strikes it on the way to the catch dish, which counts every completed run. Up to three marbles race at once over a quiet music-box and harp underlay, in a lamplit study against a deep teal wall.
Play it now
Tap once for sound - tap/space drops a marble (up to 3) - R clears
The concept is the contract
The piece was concepted first — an AI key-art painting — and its hero assets were then code-modeled in headless Blender and audited against that concept. The pair below is the contract and the build.
Concept prompt
A charming tabletop musical marble machine in warm workshop light: polished wooden ramps and curved brass rails zigzagging down a dark walnut frame, a glass marble mid-roll, a small brass bell at the bottom beside a catch cup, tiny wooden pegs and a spiral funnel along the path, deep teal wall behind, warm desk-lamp glow from the left, cozy inventor mood with soft shadows, high-end stylized 3D game render, no text, no watermark, no UI
Code-modeled in Blender
The hero assets were modelled by agents writing Blender code against the platform sculpt kit — no downloaded models anywhere — and rendered by the studio harness for audit before entering the engine scene.
Made by AI, compiled by the real Unity 6 engine
The machine and its bell are two code-modeled Blender exports; the four ramp boards ship as named nodes so the engine can fit oriented colliders and a note to each. The marbles themselves are engine spheres wearing the seeded glass variant. All sound is sampled — celesta, tubular bell, woodblocks, music box and harp — sequenced and triggered by actual collision events, never synthesized.