Describe the subject, setting, composition, and style. A useful prompt need not be long: “A green glass perfume bottle on pale stone, soft morning light, square product photograph” gives GPT Image 2.5 a clear brief. Add requirements that matter to the finished asset, such as space for a headline or an uncluttered background.
For editing, upload up to four JPG, PNG, or WebP references, each up to 15MB. Explain their roles and what should change: “Keep the bottle and label. Replace the background with a sunlit bathroom shelf.” Inspect the result; careful editing cannot promise that every tiny detail will stay exact.