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fable 5.1 generated an interactive 3D union square, and the agent filmed its own tour guide vid inside it. you can walk Powell to Stockton, read the actual storefronts, cross a working intersection, watch a cable car go by. went inside Apple and the Nintendo store, lower level included

check source code + more worlds soon

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Had to vouch for your comment, for some reason it was not visible.

> Geometry is derived from OpenStreetMap (ODbL) and USGS 3DEP (public domain).

This is probably how I would have tackled this, saves on time, especially if Fable just writes code to convert OSM data to a reasonable ThreeJS model.

Do you have data on the tokens or $ cost of this?

this is a one-shot result but i have a really really lengthy prompt: https://github.com/PhiloLabs/fable51-worlds/blob/main/union-... with clear guidance in using subagents and self-QA loop.

~2 hour (extensive subagents usage), total ~8M tokens, ~$33 under API

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