---
title: lightingModel
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/custommaterial/program-swift.class/descriptor-swift.struct/lightingmodel
---

# lightingModel

Modes that describe how materials using created CustomMaterial.Program will interact with light within the RealityKit scene.

## Declaration

```swift
var lightingModel: CustomMaterial.LightingModel
```

## Discussion

Discussion Default value is true.