---
title: viewportArrayIndex
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelrenderer/camera/viewportarrayindex
---

# viewportArrayIndex

The index into the output viewports and scissor rects arrays for this camera.

## Declaration

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

## Discussion

Discussion Corresponds to the vertex amplification viewport array index in MTLRenderCommandEncoder.

## See Also

### Specifying render targets

- [renderTargetArrayIndex](realitykit/lowlevelrenderer/camera/rendertargetarrayindex.md)