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A fog-of-war map tool for a Warhammer Fantasy RPG table

A browser map tool built with Claude for a friend's Warhammer RPG, with a GM editor and a player view projected onto a table.

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Credits

  • Reddit poster DoogleSmile Source ↗

Earliest dated source: 23 Oct 2026

Video ↗

The full story

The poster built a mapping tool for a friend's Warhammer Fantasy RPG group. The group projects a player-facing map onto a table and plays with miniatures. Maps start under fog of war and fade in when the GM clicks a room or door, and secrets and traps can be revealed by clicking icons.

The GM uses an editor to trace rooms on uploaded images, add doors, secrets and traps, and link floors. Maps save as a single JSON file with images embedded, plus a player HTML file. Claude also wrote a user guide, though showing the GM in person was easier.

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: I've been working on a mapping tool for my friend's Warhammer Fantasy RPG game so that our GM can crForum threadreddit.com
    Reddit poster: DoogleSmilePosted 23 Oct 2026

    The maker's reply in r/ClaudeAI's showcase thread.

    If it disappears: archived copy of Reddit: I've been working on a mapping tool for my friend's Warhammer Fantasy RPG game so that our GM can cr (opens in a new tab)

  • The video: youtube.comVideoyoutube.com

    Linked from the post.

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Prompt & Solder

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