## What this does

A 2-stage ComfyUI workflow for MiniMax H3 Reference-to-Video that cuts generation time while keeping quality high.

- Stage 1 (Low-Res Draft): generates the video at low resolution using only the first 4 sigmas of an 8-step Euler schedule — a fast, cheap draft pass.

- Latent Upscale: the draft's latent is upscaled directly in latent space (no pixel decode) to your target resolution using the MiniMax H3 3D Latent Upscaler.

- Stage 2 (High-Res Refine): the upscaled latent is refined with just 3 lightweight sigma steps, using the same fixed seed as Stage 1 for consistency between passes.

- Audio is generated in Stage 1 and rejoined with the upscaled video latent before final decode.

Result: video quality close to a full high-resolution single-pass generation, at a fraction of the compute/time cost.