# write(_:withSceneDocumentURL:originalImageURL:) Tells the delegate to export an image attached to a scene. ``` optional func write(_ image: UIImage, withSceneDocumentURL documentURL: URL, originalImageURL: URL?) -> URL? ``` ## Parameters `image` An image attached to the scene being exported. `documentURL` The URL the scene is being exported to. `originalImageURL` The URL the image was originally loaded from, or `nil` if the image was not previously loaded from a URL. ## Return Value The URL your app exported the image to, or `nil` if your app did not write the image to a URL. ## Discussion If you implement this method, Scene Kit calls it for each image (for example, a texture) attached to the scene. Your app can then save the image data in a location and format of your choice, returning a URL for the exported image file. If you do not provide a delegate when exporting a scene, or if your delegate returns `nil` from this method, Scene Kit exports the image in a default format to a default location. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)