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Witness

Won London's first World Models hackathon: £1,000 and £2,000 in credits. A police interviewer rebuilds a hit-and-run scene from a witness's statement as a live world you can look around.

September 12, 2026
1 min read
Hackathon
AI
World Models
Next.js
London
Witness demo

Witness, Worlds London

London's first World Models hackathon. We won it.

Witness statements are hard to picture. We turned one into a world.

The witness looks around the real street on a phone. The interviewer takes a still, draws boxes where the witness says things were and labels them: "white van, kerbside, facing away". Each box is inpainted and handed to a live world model as its reference, so you can walk around the scene.

When the witness corrects something, only that box is regenerated. The rest of the street stays put.

Stack

Next.js, React, Runware, Reactor LingBot World, phone motion sensors.

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