Demo Link: https://www.youtube.com/watch?v=rMBfE1ugpPw
Twitter Post: https://x.com/_mattqlf/status/2020679489798255080?s=20
Hi, I’m Matthew, a freshman from CMU, and I built Ephemeral in 24 hours for TartanHacks 2026.
In short, Ephemeral takes a text prompt, generates an image with Nano Banana and uses a 1.3B parameter action-conditioned DiT to generate the next frames in realtime based on user actions (e.g. WASD).
Some other features
– Reverse engineered Suno Client to generate music based off text prompt.
– Multiple users can interact with a “world” at the same time simply by scanning a QR code from their phone. They can then perform actions and see how their worlds evolve in parallel with everyone elses. GPU infrastructure powered by Modal.
– Claude auto generates captions for the world
Comments URL: https://news.ycombinator.com/item?id=46941147
Points: 1
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