# replacingSemanticSegmentationMatte(with:) Returns a semantic segmentation matte instance that wraps the replacement pixel buffer. ``` func replacingSemanticSegmentationMatte(with pixelBuffer: CVPixelBuffer) throws -> Self ``` ## Parameters `pixelBuffer` A pixel buffer containing a semantic segmentation matting image, represented as with a transfer function. ## Return Value A new semantic segmentation matte instance, or `nil` if the pixel buffer is malformed. ## Discussion When applying complex edits to media containing a semantic segmentation matte, you may create a derivative matte with arbitrary transforms applied to it. You can then use this method to create a new semantic segmentation matte instance. --- 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)