# CustomMaterial.ResourceStorage A container for resources that will be encoded into a CustomMaterial’s custom uniforms argument buffer. ``` struct ResourceStorage ``` ## Overview An object of this type is passed to you in the callback closure passed to [`withMutableUniforms(ofType:stage:_:)`](/documentation/RealityKit/CustomMaterial/withMutableUniforms(ofType:stage:_:)) and allows you to set [`TextureResource`](/documentation/RealityKit/TextureResource) values within your custom uniforms argument buffer. ## Topics ### Subscripts [`subscript(buffer _: KeyPath?>) -> LowLevelBuffer?`](/documentation/RealityKit/CustomMaterial/ResourceStorage/subscript(buffer:)) [`subscript(textureResource _: KeyPath) -> TextureResource`](/documentation/RealityKit/CustomMaterial/ResourceStorage/subscript(textureResource:)) --- 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)