ComfyUI nodes and example workflow
LBH-123-AI provides 2D and 3D latent upscaler nodes, setup instructions and a workflow template.
Read the GitHub installation guideMiniMax H3 Upscaler
Upload your H3 video as Video 1, keep its subject, scene and motion in the prompt, and choose 2K or 4K for a higher-resolution regeneration. Use the editable enhancement prompt below to focus on clearer textures, edges and fine detail.
Upload a video reference2K / 4K outputEditable enhancement prompt
Add up to 12 references: 9 images, 3 videos, and 3 audio clips. Each video or audio clip must be 2–15 seconds; videos and audio each have a separate 15-second total limit. Refer to them as Image 1, Video 1, and Audio 1 in your prompt.
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Preview video - Generate your own video above
MiniMax H3 Upscaler Guide: Inspect Fine Detail
Glass edges, condensation and reflections make this product clip a useful visual reference when reviewing detail. This is an existing H3 Max output at 768P, not a 2K/4K result or an upscaling comparison. The generator above uses base MiniMax H3.
MiniMax H3 Upscaler Options for Your Starting Point
Enhance a finished clip through video-reference regeneration, or upscale a latent within your local H3 generation workflow.
Upload your source video
Add the clip as Video 1 in the reference form above. The enhancement prompt asks MiniMax H3 to retain the original scene, subject and motion while improving detail.
Regenerate at 2K or 4K
Select 2K or 4K, match the source duration and aspect ratio, and review the credit estimate. Video-reference generation can reconstruct details, so compare the result with your original clip.
Upscale a local latent
For a local ComfyUI generation graph, use the latent resources below. This route works before decoding a video and is separate from uploading a finished clip.
How to Use the MiniMax H3 Upscaler Online
Combine your source video, a preservation-focused prompt and a higher output resolution.
01
Upload Video 1
Add your clip in the Video reference tab. Use a clear source video and keep the reference focused on the shot you want to enhance.
02
Choose 2K or 4K
Set the output resolution to 2K or 4K, then choose the source aspect ratio and the closest supported duration.
03
Enhance and review
Use or edit the prefilled enhancement prompt, review the credit estimate and generate. Check subject identity, motion and fine detail against the original before downloading.
Local workflow
MiniMax H3 Upscaler: From Latent to Video
The linked community project describes a low-resolution latent → upscale → refinement → decode workflow. It requires local ComfyUI; it is separate from the online generator.
1
Install compatible nodes and weights
Install the linked custom-node repository in ComfyUI/custom_nodes, restart ComfyUI, and place compatible checkpoints in ComfyUI/models/latent_upscale_models.
2
Upscale the H3 latent
Connect the low-resolution H3 LATENT to a 2D or 3D upscaler node. Select matching weights and the target size. The 3D variant processes spatial and temporal information jointly.
3
Refine, then decode
Use the project's example graph for the higher-resolution refinement pass and VAE decode. Budget for target-resolution sampling memory; latent upscaling does not remove that requirement.
MiniMax H3 Upscaler Downloads and Local Resources
Community-maintained resources for local use, separate from H3Vid. Follow each project's compatibility and installation instructions.
Latent upscaler model weights
The node project's README links to this checkpoint collection. Check the model files against the node variant you install.
View checkpoints on Hugging FaceMiniMax H3 Upscaler Questions
What you can generate here and when you need another workflow.
Can I upload an H3 video and enhance it here?
Yes. Upload it as a video reference, use the enhancement prompt, and select 2K or 4K. MiniMax H3 uses the source clip to guide a higher-resolution regeneration.
How do I select 2K or 4K output?
After adding Video 1, open the resolution control and choose 2K or 4K. Match the source aspect ratio and duration where possible, and review the displayed credit estimate before generating.
Will every frame stay exactly the same?
Video-reference enhancement generates a new version guided by your clip and prompt. It can change details or timing. The prefilled prompt asks the model to preserve the subject, scene and motion; inspect the result against the source.
What should I write in the enhancement prompt?
Refer to the upload as Video 1. Ask to preserve identity, composition, lighting, movement and timing while improving texture and edge clarity. The generator includes an editable prompt to start from.
Can I download latents from this generator?
No. The online generator delivers finished videos, not local latent files. The latent workflow described on this page requires your own compatible local H3 generation setup.
Is the example an upscaled 4K video?
No. It is an existing H3 Max clip generated at 768P. It illustrates the kinds of details you can inspect, rather than proving any upscaling quality improvement.
Use the MiniMax H3 Upscaler With Your Video Reference
Upload Video 1, keep its scene and motion in the prompt, and select 2K or 4K for higher-resolution output.