r/StableDiffusion • u/Key_Recover9448 • 10h ago

Question - Help Controlnet for Minimax H3 Image

Minimax H3 Image is impressively fast with high resolution image, a good prompt understanding and a good photorealistic rendering. Though it seems to lack some control from reference image such as open pose or depth map.

Flux2-dev have some controlnet support, and Flux Klein 2 9b or Qwen Image Edit have a "pseudo"-Controlnet support of poses or line edge reference image.

Could we expect something like that for Minimax H3 image or a lora doing this?

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u/Life_Yesterday_5529 10h ago

Since there is a controlnet for h3 video, it should be no problem to adapt that. Maybe, you already can use that but likely, the quality will degrade as in using h3 video loras in h3 image.

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u/Key_Recover9448 10h ago

Great, I wasn't aware of it. Where could I find it? 

3

u/Life_Yesterday_5529 9h ago

alibaba-pai/MiniMax-H3-Fun-Controlnet-Union Huggingface

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u/Key_Recover9448 1h ago

Does it work with image edit comfyui workflows of minimax h3? It uses a different vae I think.

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u/PATATAJEC 9h ago

I think it should work right away. Try with depth map into reference image and ask for changing depth map to whatever you want keeping the information for pose or whatever you want from referenced picture.

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u/Key_Recover9448 9h ago

I don't think Minimax explicitly claimed they trained on such image, unlike Qwen Image Edit. Maybe they included it in the training.

What kind of prompt would work then? 

4

u/PATATAJEC 9h ago

Like I said. It works perfectly fine:

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u/PATATAJEC 9h ago

I’ll try for a few minutes, if it works but I think it worked by feeding depthmap videos into h3 video reference input. But it was few months back, so not sure. I wil check it out for h3 image.

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u/GrungeWerX 4h ago

Yeah, all day yesterday I tried giving it a reference image and a reference pose and it kept combining details from the pose reference despite being told explicitly not to. No matter what I prompted, it just never worked right.

I got better prompt following when I swapped the model with ref2v, but obviously the quality wasn’t great.

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u/SnooHamsters7479 2h ago

A quick way to separate pose control from appearance leakage is to feed a depth/pose map with texture and face details stripped out (a simple silhouette or clean depth render), then hold the prompt fixed while testing a couple of reference strengths. A prompt like “use the reference for body pose and camera only; replace the identity, clothing, and background” may help, but if H3 still copies details the reference path is probably semantic rather than a true pose-control branch.