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Image: reddit.com · When told that he solved something that Codex failed at

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A viewer for Ninja Ripper .nr 3D files

A simple 3D viewer for Ninja Ripper .nr files, rebuilt in Rust from a Blender importer after Codex gave up and Claude finished it.

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Credits

  • Reddit poster subzerofun Source ↗

Earliest dated source: 23 Oct 2025

The full story

Ninja Ripper is used to rip 3D models from DirectX objects in memory, and there was an existing Blender Python importer for its .nr files. The poster wanted a simple standalone 3D viewer based on it. Codex failed several times, giving up on the maths, so they turned to Claude.

Claude took 4 to 5 minutes where the poster says Codex took far longer. It struggled a little, then realised the vertex coordinates had to be reprojected from the camera view so the models did not look like flat, skewed cardboard. The goal is to grow it into an Adobe Bridge style browser for more obscure 3D formats.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: When told that he solved something that Codex failed atForum threadreddit.com
    Reddit poster: subzerofunPosted 23 Oct 2025

    The maker's post on r/ClaudeAI.

    If it disappears: archived copy of Reddit: When told that he solved something that Codex failed at (opens in a new tab)

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What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

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