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Image: u/Substantial_Load_690 on Reddit · Doom monsters inside the converted Quake level, relit

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Quake's first level running in the 1993 Doom engine

Claude helped build Relit, a Three.js renderer for the original Doom engine with modern lighting, and converted Quake's E1M1 into a playable Doom level that runs inside it.

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Credits

  • Reddit poster Substantial_Load_690 Source ↗

Earliest dated source: 10 Nov 2026

Video ↗

The full story

Relit is a Three.js renderer for the original 1993 Doom engine: the engine still runs the game, and Relit draws it with modern lighting, with V flipping back to the original view. With it, Quake's first level, The Slipgate Complex, was converted from id's GPL map source into a playable Doom map using Freedoom's art. Claude did most of the coding and was made to read the actual engine code first, which showed early that Doom can't stack floors, so those parts are flattened. It's open source and runs in a browser.

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: Quake's first level running inside the original 1993 Doom engine, built with ClaudeForum threadreddit.com
    Reddit poster: Substantial_Load_690Posted 10 Nov 2026

    The maker's post on both projects.

  • The video: youtube.comVideoyoutube.com

    A short video of the Quake level in Doom.

  • Reddit: Quake's first level running inside the original 1993 Doom engine, built with ClaudeForum threadreddit.com
    Reddit poster: Substantial_Load_690Posted 10 Nov 2026

    A cross-post of the video.

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Prompt & Solder

An independent community project. Not affiliated with Anthropic.

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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