To change an image background with Seedream, start in Image to Image with a clear reference and separate what must stay from what may change. “Keep the product unchanged” is a useful intention, but it is not a pixel lock. A generative edit may alter labels, edges, or geometry even when the prompt says not to.
This guide shows how to write a constrained edit, review the result, and decide when conventional compositing is a better fit. The example is a fictional reusable bottle. It is an editorial workflow, not a claim that every generation preserves products exactly.
Decide whether generation is the right tool
Use a generative edit when you want to explore a new setting, lighting treatment, or campaign direction. Use a cutout and compositing workflow when a catalogue image must retain exact packaging, readable specifications, or a precisely approved silhouette.
For that second case, you can generate the background separately and combine it with the original product in a design editor. Do not present an approximate generated label as a faithful photo of an actual product.
Our image editing overview explains the reference-based workflow available on this site. It does not imply a brush, mask, or pixel-lock tool is available in every model.
Prepare one clean source
Choose an image with the entire subject visible and enough contrast around its edges. Avoid screenshots containing interface controls or unrelated text. If the subject is already clipped, the model must invent the missing portion, which makes preservation harder to evaluate.
Record five details before editing: silhouette, material, color, distinctive fittings, and label content. For a bottle, that might mean a cylindrical body, matte green finish, black screw cap, narrow carrying loop, and an unprinted front. Save the original so revisions can always return to it.
Open the AI image generator, switch to Image to Image, choose an available Seedream model, and upload your authorized reference. Match the original aspect ratio initially; changing the crop and background together introduces another variable.
Use a preserve/change prompt
Edit the uploaded bottle photograph.
Preserve: one bottle, its cylindrical silhouette, matte forest-green finish,
black screw cap, carrying loop, front-facing orientation and proportions.
Change: replace the existing room with a warm ivory studio background and
a pale stone tabletop. Add a soft contact shadow directly beneath the bottle.
Use broad diffused light from the upper left, with restrained reflections.
Keep the full bottle visible and leave quiet space on the right for later copy.
Do not add labels, words, hands, extra products, plants or floating objects.The preservation list gives you concrete review criteria. The change list defines the setting. The final line blocks several plausible but unwanted embellishments. These are instructions to the model, not separate UI controls.
Reconcile the old and new lighting
An outdoor background with a studio-lit subject can look like a pasted cutout. If the source has strong highlights on the right, either choose a setting consistent with that light or explicitly request a lighting change and accept that the product pixels may change too.
For exploration, a softer setting is often easier to judge than a scene with dramatic colored reflections. Request a contact shadow that agrees with the tabletop, and check whether transparent parts show the new environment coherently.
To test a lifestyle direction, change only the setting paragraph:
Replace only the setting with a quiet kitchen counter beside a north-facing
window. Keep the background out of focus, with no appliances overlapping the
bottle outline. Natural neutral daylight, no colored cast on the green finish.Compare this against the studio result using the same preservation list. Do not judge fidelity only by which background looks more attractive.
Review edges before accepting the scene
At full resolution, examine the carrying loop opening, cap threads, bottom edge, and contact shadow. Then compare the width-to-height proportions and color with the source. Inspect any letters character by character. Look for an invented second rim, extra handle, or reflection that resembles another object.
If the background is good but the cap is wrong, retry from the original reference with a narrower instruction. Repeatedly editing the last generated result can accumulate unwanted changes. Save acceptable variants in My Creations, but keep the source reference separately too.
Common questions
Can I replace the background without changing a face?
You can request identity preservation, but facial details may change. Only use portraits you are authorized to edit, compare the result carefully, and use conventional masking if exact preservation is required. For a series of scenes, read the consistent-character workflow.
Can I ask for a transparent background?
Do not assume a prompt or PNG selection guarantees transparency. Inspect the actual file's alpha channel. A white or checkerboard-looking background may still be opaque. Use a dedicated background-removal or editing tool if the selected workflow does not provide real transparency.
Why does the product keep changing?
Conflicting instructions, an obscured source, dramatic relighting, or a new camera angle can all require the model to reinterpret the subject. Remove those changes and test a simpler setting. If exactness remains the requirement, stop regenerating and composite the original subject instead.
Next step
Start with Seedream 5.0 Pro and one restrained background change. For a complete campaign, continue with the product photography guide or add carefully checked copy using our multilingual poster prompts.