# LowLevelRenderer.RenderState The per-frame render state passed to the `render(using:_:)` callback. ``` struct RenderState ``` ## Overview `RenderState` is non-copyable and non-escapable; it is only valid for the duration of the `render(using:_:)` callback. Use its methods to encode individual draw calls, or access `encoder` to issue custom Metal commands between draws. ## Topics ### Accessing the encoder [`var encoder: any MTLRenderCommandEncoder`](/documentation/RealityKit/LowLevelRenderer/RenderState/encoder) The underlying Metal render command encoder for this render pass. ### Rendering mesh instances [`func render(meshInstancesArrayIndex: Int, meshInstanceIndex: Int)`](/documentation/RealityKit/LowLevelRenderer/RenderState/render(meshInstancesArrayIndex:meshInstanceIndex:)) Encodes a draw call for a single mesh instance. [`func render(meshInstancesArrayIndex: Int, range: Range)`](/documentation/RealityKit/LowLevelRenderer/RenderState/render(meshInstancesArrayIndex:range:)) Encodes draw calls for a contiguous range of mesh instances. [`func reset()`](/documentation/RealityKit/LowLevelRenderer/RenderState/reset()) Resets the render encoder state to renderer defaults. --- 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)