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# subscript(_:)

Returns the render pipeline state for the specified color attachment.

```
subscript(attachmentIndex: Int) -> MTLRenderPipelineColorAttachmentDescriptor! { get set }
```

## Parameters

`attachmentIndex`

An index in the color attachment array.

## Return Value

An [`MTLRenderPipelineColorAttachmentDescriptor`](/documentation/Metal/MTLRenderPipelineColorAttachmentDescriptor) instance that describes the render pipeline information for a color attachment.

## See Also

  [Metal Shading Language Guide](https://developer.apple.com/library/archive/documentation/Metal/Reference/MetalShadingLanguageGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40014364)

  [Metal Programming Guide](https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40014221)


---

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