Custom ComfyUI node pushes MiniMax H3 video to 447 frames with consistent motion
No-Property3068 · reddit · 2026-10-27
A Reddit user built a custom ComfyUI node for MiniMax H3 video-to-video (VFX) work, fixing motion-transfer drift: the model degrades sharply after 192 frames at 0.5MP or 147 at 1MP.
How it works: a context-window-like node generates in batches and blends overlapping batches during generation — e.g. 447 frames at 0.5MP using 56-frame batches with 5-frame overlap. The attached images show a long live-action fire-effect shot with highly consistent motion and scene.
The node also supports spatial tiling with custom resolution/overlap, recommended mainly for a second upscaling stage. Available in ComfyUI Manager as "MiniMax H3 Temporal Window & Spatial Tiles", open-sourced on GitHub.
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