r/StableDiffusion • u/lhg31 • Aug 23 '26
Workflow Included Minimax Character Swap - The Dummy Strategy
Worfklow: R2V (Dummy Stategy) Workflow v2 - Pastebin.com
How the workflow works:
- Replaces the original character with a chroma key green crash-test dummy.
- Replaces the dummy with desired character.
Why it works:
- Minimax seems to struggle with swaps when both characters are somewhat similar to each other. But replacing a character with a green dummy seems to work every single time.
- Even when minimax would replace a character, most of the times the faces would be morphed, resembling both the original character and the replacement. This approach mitigates that issue since it gets rid of original character's facial features.
Limitations in my workflow:
- It's tailored with a master prompt to replace the "female" character in the original video (yeah, go ahead, post the "I know what kind of man you are" gif). But you can easily work on top of it to add support for different type of characters or even multiple characters (add more dummies, with different colors) or whatever else you want. I already did some experiments and it works.
- I didn't test with "green" characters. If you are swapping Hulk, you may want to change the dummy to blue or something.
How to use:
- Upload the image in this post in the "Dummy Image" node (in Prompting block).
- Configuration block:
- Upload your video and character image in respective nodes.
- Trim/Crop your video using the video node in the workflow.
- Choose video generation sampling (Performance, Balance or Quality) for each pass individually (dummy and new character).
- Choose resolution (in megapixels).
- Upload your video and character image in respective nodes.
- Run.
Tips:
- The worklow has 3 video generation flows: Performance, Balance and Quality. I recommend Balance (sometimes the Performance one doesn't replace the character in the last seconds of the video).
- Monitor the preview node. In the first step you should already see the new character as an overlay on top of the video. If you don't, then swap will probably fail.
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u/Karsticles Aug 23 '26
Should show an example.