One prompt recreates 1906 pre-earthquake SF Market Street in Blender with Opus 5.5
alexalbert__ · x · 2026-09-23
Anthropic's Alex Albert shared the full prompt used to rebuild San Francisco's Market Street as it stood on April 17, 1906 — the afternoon before the earthquake — using Opus 5.5 in Blender.
- Scope: Ferry Building to Fifth Street, including the Palace Hotel, Call Building, Chronicle Building, Lotta's Fountain and the Emporium.
- Method: the model first builds a source file from 1899-1905 Sanborn fire insurance maps, the 1906 Miles Brothers film, period photos from OpenSFHistory/Library of Congress/Rumsey, and USGS topography — recording footprint, height, facade material, occupant, source and confidence for every building.
- Everything is generated in Blender Python with no downloaded meshes, textures or HDRIs, plus reusable generators for Victorian facades and mansard roofs.
Related event: Opus 5.5 rebuilds 1906 San Francisco in Blender from one prompt(4 posts)→
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