Open-H3-Regenerate-2K ComfyUI nodes add NVIDIA IC model support for video refinement
imlo2 · reddit · 2026-11-11
Developer imlo2 updated the experimental Open-H3-Regenerate-2K ComfyUI nodes with support for NVIDIA's newer IC model — still test-stage and not low-VRAM friendly.
- Results: In the author's tests, faces, shading and small shapes stay closer to the source while details gain definition, making it more useful as a refiner; as a generative upscaler it can still reinterpret features, lettering and textures. The comparison image (2560×1440) shows IC/Sharp 1 producing finer hair and skin texture than Lanczos upscaling.
- What's new: Separate IC loader and video refinement nodes; adjustable IC and LMS Sharp strengths; three- and four-step sampling; example workflows, source clip, full-res output and lossless comparisons; the original refinement method remains available.
- Setup: Requires a recent ComfyUI, the Ref2VA model and supporting adapters; a one-time script downloads 26 GB and saves a reusable 185 MiB timestep file.
- Tested on: Windows / RTX 5090 32GB / 128GB RAM; smaller cards unvalidated, and long videos use separate windows with possible visible boundaries.
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