---
title: vertexCreaseIndices
framework: modelio
role: symbol
role_heading: Instance Property
path: modelio/mdlsubmeshtopology/vertexcreaseindices
---

# vertexCreaseIndices

A buffer containing vertex indices to be treated as creases during surface subdivision.

## Declaration

```swift
var vertexCreaseIndices: (any MDLMeshBuffer)? { get set }
```

## Discussion

Discussion Each of entry in this buffer identifies a vertex that is to be treated as a crease or point during surface subdivision. The buffer is sparse, containing only those vertex indices to be treated as creases. The corresponding entry in the vertexCreases buffer provides a sharpness value for the crease. Because the number of entries in this buffer is likely to be different than the number of entries in any other vertex buffer, it shouldn’t be interleaved with other data in the mesh.

## See Also

### Identifying Creases

- [edgeCreaseIndices](modelio/mdlsubmeshtopology/edgecreaseindices.md)
- [edgeCreases](modelio/mdlsubmeshtopology/edgecreases.md)
- [edgeCreaseCount](modelio/mdlsubmeshtopology/edgecreasecount.md)
- [vertexCreases](modelio/mdlsubmeshtopology/vertexcreases.md)
- [vertexCreaseCount](modelio/mdlsubmeshtopology/vertexcreasecount.md)