picsart_change_bg

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Replaces the background of an image with a new scene described by a prompt, keeping the foreground subject intact. Auto-picks the newest enabled Picsart change-bg model unless overridden via the `model` param — no need to call `picsart_list_models` first. Use this when the user wants to "change the background to X", "put this on a beach", "swap the background for a marble counter", or any compositing where the subject is kept and the backdrop changes. Do NOT use this to strip the background to transparency (use `picsart_remove_bg`), upscale or sharpen (use `picsart_enhance`), convert raster to SVG (use `picsart_vectorize`), or generate a brand-new image from scratch (use `picsart_generate`). Required inputs: `image` — a publicly-accessible URL, not a local file path — and `prompt` describing the new background. Optional: `model` to pin a specific change-bg model; preflight the explicit model id you plan to use (the default path may select `recraftv3-replace-bg` rather than the legacy `picsart-change-bg`). Example: `{ image: "https://example.com/product.jpg", prompt: "polished marble countertop with soft window light" }`. Returns `{ assets, id, model, created_at, prompt, summary, why_relevant, url, results: [{ url, metadata? }], drive? }` as a single JSON text block plus matching structuredContent (no `resource_link` blocks — the widget is the single source of visual truth, so result URLs are not duplicated as separate content blocks). `id` is the SDK's generation handle; `metadata` may include model-specific tags (e.g. `exploreImageId` for Recraft Explore models). Spends credits. Requires Authorization: Bearer <picsart_token>.