---
title: motionTransformBuffer
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4indirectinstanceaccelerationstructuredescriptor/motiontransformbuffer
---

# motionTransformBuffer

A buffer containing transformation information for instance motion keyframes, formatted according to the motion transform type.

## Declaration

```swift
var motionTransformBuffer: MTL4BufferRange { get set }
```

## Discussion

Discussion Each instance can have a different number of keyframes that you configure via individual instance descriptors. You are responsible for ensuring the buffer address the range references is not zero when using motion instance descriptors.