---
title: renderTargetArrayLength
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelrenderer/output-swift.struct/rendertargetarraylength
---

# renderTargetArrayLength

The number of active array slices in the render target textures.

## Declaration

```swift
var renderTargetArrayLength: Int { get set }
```

## Discussion

Discussion Corresponds to MTLRenderPassDescriptor.renderTargetArrayLength. Set this to the size of the texture array when using multi-viewport rendering into texture slices.

## See Also

### Configuring render targets

- [renderTargetWidth](realitykit/lowlevelrenderer/output-swift.struct/rendertargetwidth.md)
- [renderTargetHeight](realitykit/lowlevelrenderer/output-swift.struct/rendertargetheight.md)
- [threadgroupMemoryLength](realitykit/lowlevelrenderer/output-swift.struct/threadgroupmemorylength.md)