Add “Background Replacement Only” Mode

Relight is a great feature, but it would be really helpful to have a mode that keeps the subject 100% unchanged while only replacing the background.

Right now, changing the background can affect faces and details. A “background replacement only” option would allow users to maintain consistency while still customizing the environment.

This could include:

• preset backgrounds

• uploading custom backgrounds

• or generating backgrounds with prompts

This would be especially useful for content creators and small businesses who need consistent, realistic visuals without altering the subject.