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Reflection Lab

Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Reflection Lab — Demo video

Reflection Lab is a 3D room you can hear while you design it. It runs in the browser with real-time physics and traces the sound paths that reflect off each surface, so you can see and hear how a space shapes sound. Most people can't hear a room until it's built, and setting one up to test takes a lot of manual work. With Reflection Lab you describe the room in plain words and Muse builds it: a stage, a piano, rows of chairs, columns and wall panels. Every change is previewed and checked before it's applied. The surfaces Muse adds affect the sound right away, and the app lists the reflections off them. You can then walk through the room in first person, throw objects, change how they sound, and send a sound source on a path around the listener. It's for sound designers, game audio teams and architects who want to try a space early. The acoustics are a real-time approximation, not a measurement.

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