Filmmaker releases full open-source project for a Harry Potter short made with MiniMax H3
R34vspec · reddit · 2026-10-30
Reddit user R34vspec created "Petunia," a Harry Potter universe short film using MiniMax's H3 video model, built entirely with Longshot Studio — his open-source tool that runs locally on your own ComfyUI instance. The full project file is downloadable so anyone can inspect how it was made.
He notes editing a short film is far harder than a music video, and details recent Longshot Studio improvements:
- Group folders: organize shots by scene/act with one-click restoration of all reference images
- Audio separation: a stems detector outputs dialogue and SFX as separate .wav files, solving clashes in film work
- Consecutive shot modes: Cut (hard cut), Context (uses last frame of previous shot as reference), Bridge, Lead In, Cutaway (for B-roll), and Continuous (increasingly long single takes)
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