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How to combine multiple reference images in one edit with Comfy UI Mini Max H3 Image Studio

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

  • Content
  • Advanced
  • 120 minutes
  • From the README
  • Any agent

Who it is forA designer or content maker who has several reference pictures and needs one composite image that uses a specific element from each.

The problemMerging elements from several photos by hand in an editor is slow, and a single-source prompt cannot name which picture supplies which element.

The outcomeOne composite image built from the roles assigned to each reference picture.

What you need first

  • 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

Steps

  1. Set up Image Studio and the three model files as described in the README.
  2. Open the Edit workflow and add picture sockets to Image Edit, which grow as needed up to nine pictures total.
  3. Load each reference image into its own socket, noting which picture is which.
  4. Write a prompt that assigns each picture an explicit role, for example keeping the person and clothes from one picture and using the pose from another.
  5. Queue the workflow and check that each role was applied, then rerun with a different seed if needed.

Prompt for your agent

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.

Caveat. Multi-reference results vary and the README does not guarantee that the model follows every role assignment.

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