---
title: tileFunctionDescriptor
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4tilerenderpipelinedescriptor/tilefunctiondescriptor
---

# tileFunctionDescriptor

Configures the tile function that the render pipeline executes for each tile in the tile shader stage.

## Declaration

```swift
@NSCopying var tileFunctionDescriptor: MTL4FunctionDescriptor? { get set }
```