---
title: textureRegion
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4updatesparsetexturemappingoperation/textureregion
---

# textureRegion

The region in the texture to update, in tiles.

## Declaration

```swift
var textureRegion: MTLRegion
```

## Discussion

Discussion When textureLevel is equal to the texture’s firstMipmapInTail, set origin.y to 0 and size.height to 1.