Recreating Hamburg City Hall in Unreal Engine 5.8 with Claude Opus 5.5 — no hand sculpting
jamestagg · x · 2026-10-08
@rewind02 shares a full workflow for recreating Hamburg City Hall in Unreal Engine 5.8 using Claude Opus 5.5, with nothing sculpted by hand — the building is generated from code.
Key steps:
- Claude Code connects to Blender and Unreal via MCP
- Opus writes Python scripts generating the building from parameter files: massing, facades, ornament, windows, statues, materials
- Heights and proportions come from the city's official open 3D model, not guesswork
- Renders control images and compares them against photos and street view
- Normals and visibility checks run before every export
- The model enters Unreal as a single Nanite asset
- Every measurement and decision is logged in project docs
The core lesson: measure, don't guess — fix parameters against real data instead of eyeballing.
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