# init(scale:texture:) Creates an anisotropy angle object using a single value or a texture. ``` init(scale: Float = 1.0, texture: PhysicallyBasedMaterial.Texture? = nil) ``` ## Parameters `scale` The anisotropy angle value for the entire material. `texture` The anisotropy angle values as a UV-mapped image. ## Discussion This initializer allows you to create an instance using either a single value for the entire material, or a UV-mapped image. If you specify `texture`, RealityKit calculates the anisotropy angle for the entity by UV-mapping `texture` onto the entity and multiplying the value of each mapped pixel by `scale`. If you don’t specify `texture`, then RealityKit uses `scale` as the entire entity’s anisotropy angle. If you provide a color image for `texture` rather than a grayscale image, RealityKit only uses the intensity of the image’s red channel. --- 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)