---
title: geometryModifier
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelmaterialresource/shadergraphoutput/geometrymodifier
---

# geometryModifier

The compiled geometry modifier, or nil if the ShaderGraph does not include one.

## Declaration

```swift
var geometryModifier: LowLevelMaterialResource.GeometryModifier? { get }
```

## See Also

### Specifying the shaders

- [surfaceShader](realitykit/lowlevelmaterialresource/shadergraphoutput/surfaceshader.md)