openapi: 3.1.0
info:
  title: Stability AI Stable Fast 3D 3D Generation Replace Background and Relight API
  description: The Stability AI Stable Fast 3D API generates textured 3D mesh assets from single input images. The API rapidly produces 3D models suitable for use in games, augmented reality, virtual reality, and product visualization workflows. Developers can convert 2D images into fully textured 3D objects with UV-unwrapped meshes, enabling rapid prototyping and asset creation without manual 3D modeling.
  version: v2beta
  contact:
    name: Stability AI Support
    url: https://platform.stability.ai
  termsOfService: https://stability.ai/terms-of-service
servers:
- url: https://api.stability.ai
  description: Production Server
security:
- bearerAuth: []
tags:
- name: Replace Background and Relight
  description: Replace the background of an image and adjust lighting conditions using AI-powered scene understanding.
paths:
  /v2beta/stable-image/edit/replace-background-and-relight:
    post:
      operationId: editImageReplaceBackgroundAndRelight
      summary: Replace background and adjust lighting
      description: Replaces the background of an image with new content described by a text prompt and adjusts lighting conditions to match the new scene. The foreground subject is preserved while the background is regenerated.
      tags:
      - Replace Background and Relight
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/ReplaceBackgroundAndRelightRequest'
      responses:
        '200':
          description: Successfully replaced background and adjusted lighting
          content:
            image/jpeg:
              schema:
                type: string
                format: binary
            image/png:
              schema:
                type: string
                format: binary
            image/webp:
              schema:
                type: string
                format: binary
            application/json:
              schema:
                $ref: '#/components/schemas/EditImageResponse'
        '400':
          description: Bad request due to invalid parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized due to missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: Forbidden due to content moderation or insufficient permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    ReplaceBackgroundAndRelightRequest:
      type: object
      required:
      - image
      properties:
        image:
          type: string
          format: binary
          description: The source image whose background will be replaced.
        background_prompt:
          type: string
          maxLength: 10000
          description: Text describing the new background scene and lighting conditions.
        foreground_prompt:
          type: string
          maxLength: 10000
          description: Text describing any adjustments to the foreground subject.
        negative_prompt:
          type: string
          maxLength: 10000
          description: Text describing elements to exclude from the result.
        seed:
          type: integer
          minimum: 0
          maximum: 4294967294
          default: 0
          description: A value to control randomness in generation.
        output_format:
          type: string
          enum:
          - jpeg
          - png
          - webp
          default: png
          description: The output format of the edited image.
    EditImageResponse:
      type: object
      properties:
        image:
          type: string
          description: Base64-encoded image data when Accept header is set to application/json.
        finish_reason:
          type: string
          enum:
          - SUCCESS
          - CONTENT_FILTERED
          description: The reason the edit finished.
        seed:
          type: integer
          description: The seed used for generation.
    ErrorResponse:
      type: object
      properties:
        id:
          type: string
          description: A unique identifier for the error instance.
        name:
          type: string
          description: The error type name.
        message:
          type: string
          description: A human-readable description of the error.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key authentication. Pass your Stability AI API key as a Bearer token in the Authorization header.
externalDocs:
  description: Stability AI API Documentation
  url: https://platform.stability.ai/docs/api-reference