Generate ad image
generate_imageGenerate finished ad images from prompts and product references, returning a served URL for on-brand compositing, edits, or product-in-hand and try-on renders.
Instructions
Render a finished ad IMAGE and return its served URL. refImages (local paths or URLs) force product-accurate compositing (drops a real product into the scene). MULTI-BRAND CAUTION: useBrand hydration pulls the SAVED workspace brand — when working a brand that is NOT the saved one (a fresh draft_brand), pass that brand's own productImages/logo as refImages (and useBrand:false) or the output composites the WRONG brand's product. NOTE that the saved-brand hydration also decides the ENGINE: attaching product photos routes the render to the compositing model, so a model you named is only honoured when no references ride — pass raw:true (or useBrand:false) to render on exactly the model you asked for. model = a catalog id from hermoso_capabilities (omit for the default). PUTTING A REAL PRODUCT IN A REAL PERSON’S HANDS, or a garment on them, is a DIFFERENT KIND OF ROW and you must name it: the ids marked needsRefs with a refsMax in hermoso_capabilities take a person photo first and up to three product/garment photos after it, and they EDIT THE PHOTOGRAPH rather than compositing — THE PERSON IS RE-POSED to hold or wear the thing, so their stance and hands change while their face, clothing, setting and lighting are kept. That is not an object swap in a fixed frame; if you needed the rest of the photograph untouched, this is the wrong tool. Every finished render says which way it went. RAW MODEL ACCESS: raw:true dispatches your prompt to the model BYTE-IDENTICAL — no rewriting, no appended guidance, no negative prompt, no brand references attached on your behalf. Credits, the durable delivery of the finished asset and the per-model validation are unchanged. Fast (seconds). Spends credits.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| raw | No | RAW MODEL ACCESS: run the caller’s prompt on the named model with no Hermoso adjustments at all — the prompt reaches the provider byte-identical (no hex-to-colour-name rewrite, no prepended fidelity preamble) and NO saved-brand product photos are attached, so the model you name is the model that renders. Use it to drive the raw catalog; leave it off for an on-brand ad. Billing, the durable Library landing and per-model validation are unchanged. | |
| mask | No | MASKED EDIT — change ONE region of an image and keep the rest: a local path or URL of a mask image for refImages[0] (the image being edited). Either convention works and the reply says which it read: TRANSPARENT pixels = change, or, on a mask with no transparency, WHITE = change and black = keep. Any size; it is scaled to the image. The mask GUIDES the edit rather than stencilling it: the new content can blend a little past its edge. Runs on the model hermoso_capabilities marks `refs.mask` (gpt-image-2.5): leave `model` empty or name that one — any other named model is refused, free. Needs refImages; the result keeps the source image's own frame, so aspectRatio is not applied. | |
| model | No | image model id from hermoso_capabilities. A model whose `refs.mode` is "edit" there (gpt-image-2.5) takes your refImages on ITS OWN editor, up to its `refs.max`, instead of the default compositor | |
| prompt | No | REQUIRED on every model EXCEPT the pose rows below. the full image prompt — subject, composition, lighting, and any on-image ad text. ON A POSE MODEL (product-in-hand / try-on) THIS IS EXTRA DIRECTION AND IT IS OPTIONAL — leave it out and the pose is built for you. If you do write one, DESCRIBE THE POSE ("she holds the bottle upright in her right hand at chest height, label to camera"); do NOT phrase it as a swap ("replace the mug with the bottle"), which is REFUSED for free, because the product then comes out the size of whatever it replaced — a 30ml bottle rendered mug-sized in testing. | |
| fixLabel | No | default true: when the saved brand's product photo rides in this render, the product's label on the finished image is READ and compared with the photo, and re-printed from the photo at close range ONLY if it came out wrong (a label that is already right costs only the check, a credit or two; a re-print adds about ten). The reply says whether the label was checked, fixed or left as rendered (`labelPass`). Pass false when the user wants the packaging left exactly as generated: nothing is checked or re-printed. | |
| useBrand | No | default true: with no refImages, the server hydrates the SAVED brand’s product/logo references so the output lands on-brand; pass false for a pure prompt-only render | |
| imageSize | No | pixel-size preset for models that support it: 1K/2K, and 4K on the models hermoso_capabilities lists with a 4K imageSize price (a 4K ask on any other model is refused, free) — omit for the default | |
| refImages | No | local file paths or URLs of product/logo references to composite in. ON THE POSE MODELS — any row hermoso_capabilities marks `needsRefs` with a `refsMax`, such as putting your product in someone’s hands or a virtual try-on — THE ORDER IS THE CONTRACT AND IT IS NOT A COMPOSITE: refImages[0] is the PERSON photo, and the rest (up to `refsMax` minus one) are the product or garment photos. Reversed, you get the product wearing the person. A 4th product is dropped and the reply says so. Using a real person’s face, likeness or voice confirms you are them or have their consent, take full, unlimited responsibility for its use and will cover any claim against Hermoso (hermoso.ai/terms). Paid plan only; recorded. | |
| aspectRatio | No | e.g. '1:1', '9:16', '16:9', '4:5'. Each model draws its own list (hermoso_capabilities prints it per model, e.g. Nano Banana 2 goes to 1:8 and 8:1); a ratio the chosen model cannot draw is refused before anything is charged | |
| logoPlacement | No | overlay: real logo file laid flat. in_scene: on something in the scene, from the file, checked. auto (default): from the prompt |