---
title: CustomMaterial.LightingModel.lit
framework: realitykit
role: symbol
role_heading: Case
path: realitykit/custommaterial/lightingmodel-swift.enum/lit
---

# CustomMaterial.LightingModel.lit

The entity renders using physically based rendering techniques without a clearcoat.

## Declaration

```swift
case lit
```

## Discussion

Discussion A custom material using the CustomMaterial.LightingModel.lit lighting model uses physically based rendering techniques, but doesn’t render a clearcoat. If a CustomMaterial.LightingModel.lit material’s surface shader calls params.surface().set_clearcoat() or params.surface().set_clearcoat_roughness(), ReallityKit ignores it.

## See Also

### Specifying the lighting model

- [CustomMaterial.LightingModel.clearcoat](realitykit/custommaterial/lightingmodel-swift.enum/clearcoat.md)
- [CustomMaterial.LightingModel.unlit](realitykit/custommaterial/lightingmodel-swift.enum/unlit.md)