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Vox Arcana: Gemini 3.8 Live as a voice dungeon master that rolls dice and paints scenes mid-sentence

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Breakdown2 min readLast edited October 13, 2026

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genevieve__h, who works in developer relations for Google AI Studio, built Vox Arcana, a browser D&D table where Gemini 3.8 Live is the dungeon master. You talk; it narrates aloud and, in the same breath, rolls dice and paints the scene. Her 15-minute session rests on one thing: the model calls tools while it talks, so the story doesn't stop for a roll or a picture. A voice NPC can run on the same structure.

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Written by the OpenDrama editors from a public post. Stills are quoted from the original video for commentary; tools, settings and steps are our own reconstruction. All rights in the original work stay with its creator — ask us and we take a still down.

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