---
title: alphaBlendOperation
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4renderpipelinecolorattachmentdescriptor/alphablendoperation
---

# alphaBlendOperation

Configures the alpha blending operation.

## Declaration

```swift
var alphaBlendOperation: MTLBlendOperation { get set }
```

## Discussion

Discussion This property defaults to MTLBlendOperationAdd.