PRODUCTION SCENARIO
A marketing team has a finished product photo and wants a generative image model to replace only the background, leaving the bottle pixels untouched.
How should the team indicate which region the model may change?
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Show answer and explanation
Answer: Supply a PNG mask with transparent pixels over the editable area
The image edit API takes a mask that defines the area of the image the model is allowed to edit, marked with fully transparent pixels, and the mask must be a PNG with the same dimensions as the input image. Prompt wording alone does not constrain which pixels change.