Zero code: 2 days building a drivable Paris with Codex + Tripo, 386-page open-source handbook
AlchainHust · x · 2026-09-15
After GPT-6 Astra launched, many people tried having Codex drive Blender via computer use to build 3D models. Author Huashu tested both that and direct code generation with Claude Code and Codex, finding neither cost- nor efficiency-optimal.
He devised a hybrid strategy and built a drivable Paris in two days without writing code:
- Cars, trees, Eiffel Tower, pedestrians: AI-generated 3D assets from Tripo
- City blocks, bridges, Seine river: drawn in code
- The split logic: players drive close to cars but never under bridges, so near-field gets detailed models and far-field gets code — balancing detail and frame rate
The full workflow is open-sourced as a 386-page, 256k-word handbook on GitHub: covering image-to-3D pipelines, retopology, rigging/animation, credit-budgeting, and a symptom-indexed troubleshooting appendix, plus 11 standalone resource packs (design sheets, raw prompts in jobs.l, GLB assets, scripts) and six playable demos.
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