# LowLevelTextureResource A container for texture data in a custom format. ``` final class LowLevelTextureResource ``` ## Overview Use `LowLevelTextureResource` when you want to bring your own texture data to the renderer or update your data frequently. Textures are updated on the GPU by writing to a `MTLTexture` returned by `replace(commandBuffer:)`. The descriptor is analogous to `MTLTextureDescriptor`. Create a `LowLevelTextureResource` using [`makeTextureResource(descriptor:)`](/documentation/RealityKit/LowLevelRenderContext/makeTextureResource(descriptor:)). ## Topics ### Accessing the descriptor [`var descriptor: LowLevelTextureResource.Descriptor`](/documentation/RealityKit/LowLevelTextureResource/descriptor-swift.property) The descriptor used to create this texture resource. [`struct Descriptor`](/documentation/RealityKit/LowLevelTextureResource/Descriptor-swift.struct) The configuration for a new low-level texture resource. ### Reading and writing texture data [`func read(commandBuffer: (any MTLCommandBuffer)?) -> any MTLTexture`](/documentation/RealityKit/LowLevelTextureResource/read(commandBuffer:)) Returns a Metal texture containing the current contents of the texture resource for GPU read operations. [`func replace(commandBuffer: (any MTLCommandBuffer)?) -> any MTLTexture`](/documentation/RealityKit/LowLevelTextureResource/replace(commandBuffer:)) Returns a Metal texture you populate on the GPU with the new contents of the texture resource. --- 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)