---
title: materialAssignment
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/meshresource/shapeextrusionoptions/materialassignment-swift.property
---

# materialAssignment

Determines the material assignments for each part of an extruded shape.

## Declaration

```swift
var materialAssignment: MeshResource.ShapeExtrusionOptions.MaterialAssignment
```