Replacing a character in a crowded video is not just a prompt-writing problem. The workflow also needs to identify the right person, carry that selection through the frames, and place the generated region back into the scene. A detailed replacement prompt cannot rescue a mask that follows the w...
Source: [Dev.to](https://dev.to/ai-ksk/h3-character-swap-15-in-comfyui-check-the-mask-before-the-render-1n3b)