What you can do with Comfy UI Mini Max H3 Image Studio

3 use cases

• Generate a still image from a text prompt

  Render a single still image from a written prompt using the MiniMax H3 Generate workflow in ComfyUI.

  • Comfy UI Mini Max H3 Image Studio
  • Content
  • Intermediate
  View prompt

  Using the astropuzzo/ComfyUI-MiniMax-H3-Image-Studio repo, set up the Generate workflow in ComfyUI for the prompt <target prompt>. Confirm ComfyUI is 0.37.0 or newer and the three model files are in their folders, then queue the job. Expected output: one saved image from Save Image; verify that the run_info in Render Image lists the applied settings.

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• Edit an existing image with a text instruction

  Change a source image, such as its background, by giving H3 a plain-language instruction in the Edit workflow.

  • Comfy UI Mini Max H3 Image Studio
  • Content
  • Intermediate
  View prompt

  Using the astropuzzo/ComfyUI-MiniMax-H3-Image-Studio repo, run the Edit workflow in ComfyUI on the source image <source image path> with the instruction <instruction text>. Expected output: one edited image from Save Image that keeps the source proportions. Verify that the subject and layout the instruction says to keep are still present.

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• Combine multiple reference images in one edit

  Assign roles to up to nine pictures so H3 takes a person, pose and room from separate references.

  • Comfy UI Mini Max H3 Image Studio
  • Content
  • Advanced
  View prompt

  Using the astropuzzo/ComfyUI-MiniMax-H3-Image-Studio repo, run the Edit workflow in ComfyUI with the reference images <list of image paths> and the role prompt <role prompt>. Expected output: one composite image from Save Image. Verify that each reference contributed the role the prompt assigned to it.

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How to use Comfy UI Mini Max H3 Image Studio

1. Check you have what it needs: ComfyUI 0.37.0 or newer; A CUDA/PyTorch installation that supports the chosen quantization; Three model files: minimax_h3_fl2va_pruned_int8_convrot.safetensors, qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors, and an H3 video VAE.
2. Open astropuzzo/ComfyUI-MiniMax-H3-Image-Studio on GitHub and read the README and license.
3. Install Image Studio through ComfyUI Manager or clone the repository into ComfyUI/custom_nodes/, then restart ComfyUI and refresh the browser.
4. Place the three starting model files in models/diffusion_models/, models/text_encoders/ and models/vae/ as listed in the README.
5. Open Templates, choose MiniMax H3 Image Studio, and load the Generate workflow.
6. In H3 • Models, select the three files, write the prompt, choose aspect ratio and megapixels (3 MP is the starting point), then queue.

These steps come from our top use case, Generate a still image from a text prompt, which also has a copy-paste agent prompt.

Comfy UI Mini Max H3 Image Studio alternatives · Best AI repos for Content

About this repo

• Who it is forAimed at ComfyUI users with a working setup who want to generate or edit still images with MiniMax H3 models.
• Why it is hot
• LanguagePython
• Sourcegithub.com/astropuzzo/ComfyUI-MiniMax-H3-Image-Studio · Back to Hot repos

Requirements

• ComfyUI 0.37.0 or newer
• A CUDA/PyTorch installation that supports the chosen quantization
• Three model files: minimax_h3_fl2va_pruned_int8_convrot.safetensors, qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors, and an H3 video VAE
• Enough GPU memory for the chosen megapixel size; out-of-memory errors are possible at larger sizes

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