Runway H3 Model Confuses Character Voices in Multi-Character Dialogues

ptwonline · reddit · 2026-08-05

A Reddit user reported that Runway's H3 video generation model struggles with multi-character dialogue scenarios. The model correctly differentiates voices when characters speak infrequently, but if the interaction frequency increases (e.g., each character speaking twice or more), the model fails and uses the same voice for both characters.

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