---
title: motionTransformBufferOffset
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlinstanceaccelerationstructuredescriptor/motiontransformbufferoffset
---

# motionTransformBufferOffset

The offset, in bytes, to the descripton of the first motion transform.

## Declaration

```swift
var motionTransformBufferOffset: Int { get set }
```

## Discussion

Discussion The offset needs to be a multiple of 64 bytes. Check the Metal feature set tables (PDF) for potential alignment restrictions.

## See Also

### Specifying motion data

- [motionTransformCount](metal/mtlinstanceaccelerationstructuredescriptor/motiontransformcount.md)
- [motionTransformBuffer](metal/mtlinstanceaccelerationstructuredescriptor/motiontransformbuffer.md)