# uvScale A scale to apply to lightmap UV attribute before sampling from the slice of the atlas. Note that lightmap textures use the Metal convention: UV (0,0) corresponds to the top-left corner of the image, while UV (1,1) corresponds to the bottom-right. ``` var uvScale: SIMD2 ``` --- 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)