GPT-6 Astra built a Manhattan world in Unreal Engine street by street over a week

chongdashu · x · 2026-09-04

Developer mattshumer showed off GPT-6 Astra building a Manhattan world in Unreal Engine over the course of a week — going street by street to make each one perfect. Commenters are asking how it interfaced with Unreal (via MCP?), highlighting growing interest in agents operating professional 3D engines directly.

Related event: Matt Shumer demos "GPT-6 Astra": Manhattan built in a week, agents start talking on their own(12 posts)→

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