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A Nintendo 3DS turned into a 3D test monitor

Claude helped write 3DS homebrew so the handheld can show live side-by-side 3D output from a desktop 3D graphics app, standing in for a 3D monitor.

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Credits

  • Reddit poster BiscuitShelter Source ↗

Earliest dated source: 9 Jan 2026

The full story

A developer making a 3D graphics app called Tripmunk 3D Studio had no 3D monitor to test its side-by-side 3D modes, so they had Claude help write Nintendo 3DS homebrew that turns the handheld into a live 3D display. The touchpad rotates the scene cameras and the directional pad changes the speed of the shader loop.

They also added an 800x240 side-by-side MJPEG option so beat-synced 3D videos can be transcoded to play on the 3DS, which already works. It worked "WAY better" than expected, and they plan to ship the homebrew app with the software.

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: Claude helped turn my Nintendo 3DS into a 3D monitor for testing my upcoming Tripmunk 3D StudioForum threadreddit.com
    Reddit poster: BiscuitShelterPosted 9 Jan 2026

    The maker's post on r/ClaudeAI.

    If it disappears: archived copy of Reddit: Claude helped turn my Nintendo 3DS into a 3D monitor for testing my upcoming Tripmunk 3D Studio (opens in a new tab)

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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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