AI bottle label mockup: put your label on a bottle photo

To mock up a label on a bottle, send two images as references: Image 1 the empty bottle photo, Image 2 the flat label artwork, and tell the model to wrap Image 2 onto the label area of Image 1 without changing either. On Sume this is one POST /v1/images with two entries in input_references. GPT Image 2.5 takes up to 16 references, and you refer to them by order in the prompt (numbered references).

Request

Upload both files to public HTTPS URLs. State the role of each reference and the rule that the label art must keep its exact text, colours and layout. Ask for a gentle curve and the same lighting as the bottle photo.

Use aspect_ratio: "auto" so the output follows the bottle photo.

curl -X POST https://api.sume.com/v1/images \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-image-2.5",
  "prompt": "Image 1 is a plain amber bottle. Image 2 is a flat label design. Apply the label from Image 2 to the front of the bottle in Image 1 with a slight cylindrical curve and matching light. Do not change the label text, colours or layout. Do not change the bottle.",
  "input_references": [
    {"type":"image_url","image_url":{"url":"https://example.com/bottle.jpg"}},
    {"type":"image_url","image_url":{"url":"https://example.com/label.png"}}
  ],
  "aspect_ratio": "auto",
  "quality": "high"
}'

What goes wrong

Two failure patterns recur. The label art gets redrawn instead of copied, so small type changes, and the label lands on the wrong part of the bottle. Mitigate the first by keeping label type large, and the second by naming the area: "centred on the front panel, between the shoulder and the base".

If the label spills outside the intended area, a masked edit can limit the change to one region. The mask is guidance, not an exact shape, so check the edges (masks with several references).

Use as a proof, not a print file

The result is a raster picture. It shows a client what the pack will look like. Keep the original vector art for print.