---
title: alphaToCoverageState
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4meshrenderpipelinedescriptor/alphatocoveragestate
---

# alphaToCoverageState

Indicates whether to read and use the alpha channel fragment output of color attachments to compute a sample coverage mask.

## Declaration

```swift
var alphaToCoverageState: MTL4AlphaToCoverageState { get set }
```