---
title: LowLevelMaterialResource.LightingFunction
framework: realitykit
role: symbol
role_heading: Class
path: realitykit/lowlevelmaterialresource/lightingfunction
---

# LowLevelMaterialResource.LightingFunction

A compiled function that evaluates lighting for a surface shader stage.

## Declaration

```swift
final class LightingFunction
```

## Topics

### Configuring shader arguments

- [parameterMapping](realitykit/lowlevelmaterialresource/lightingfunction/parametermapping.md)
- [argumentTableDescriptor](realitykit/lowlevelmaterialresource/lightingfunction/argumenttabledescriptor.md)

## Relationships

### Conforms To

- [LowLevelMaterialResource.Function](realitykit/lowlevelmaterialresource/function.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Configuring the shaders

- [surface](realitykit/lowlevelmaterialresource/surface.md)
- [LowLevelMaterialResource.SurfaceShader](realitykit/lowlevelmaterialresource/surfaceshader.md)
- [geometry](realitykit/lowlevelmaterialresource/geometry.md)
- [LowLevelMaterialResource.GeometryModifier](realitykit/lowlevelmaterialresource/geometrymodifier.md)
- [LowLevelMaterialResource.Function](realitykit/lowlevelmaterialresource/function.md)