---
title: LitLightingModel.SpecularModel
framework: realitykit
role: symbol
role_heading: Enumeration
path: realitykit/litlightingmodel/specularmodel-swift.enum
---

# LitLightingModel.SpecularModel

The specular lighting algorithm used in a LitLightingModel.

## Declaration

```swift
enum SpecularModel
```

## Topics

### Choosing a specular model

- [LitLightingModel.SpecularModel.ggx](realitykit/litlightingmodel/specularmodel-swift.enum/ggx.md)
- [LitLightingModel.SpecularModel.anisotropicGGX](realitykit/litlightingmodel/specularmodel-swift.enum/anisotropicggx.md)
- [LitLightingModel.SpecularModel.blinnPhong](realitykit/litlightingmodel/specularmodel-swift.enum/blinnphong.md)
- [LitLightingModel.SpecularModel.sheen](realitykit/litlightingmodel/specularmodel-swift.enum/sheen.md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Configuring shading models

- [diffuseModel](realitykit/litlightingmodel/diffusemodel-swift.property.md)
- [LitLightingModel.DiffuseModel](realitykit/litlightingmodel/diffusemodel-swift.enum.md)
- [specularModel](realitykit/litlightingmodel/specularmodel-swift.property.md)