MiniMax H3 character + background swap — workflow and demo assets

Load either MiniMax-H3-Character+bg-swap.json or the original MiniMax-H3-Character+BG-Swap-workflow.png by dragging it onto the ComfyUI canvas. The PNG contains embedded workflow JSON.

Also included: shadowbox-ref.mp4, character-ref.png, background.png.
Install missing custom nodes and download the matching models separately.
