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# SCNMaterial.LightingModel

Constants specifying the lighting and shading algorithm to use for rendering a material.

```
struct LightingModel
```

## Discussion

![](images/com.apple.scenekit/media-2929794@2x.png)

## Topics

### Type Properties

[`blinn`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/blinn)

Shading that incorporates ambient, diffuse, and specular properties, where specular highlights are calculated using the Blinn-Phong  formula.

[`constant`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/constant)

Uniform shading that incorporates ambient lighting only.

[`lambert`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/lambert)

Shading that incorporates ambient and diffuse properties only.

[`phong`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/phong)

Shading that incorporates ambient, diffuse, and specular properties, where specular highlights are calculated using the Phong  formula.

[`physicallyBased`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/physicallyBased)

Shading based on a realistic abstraction of physical lights and materials.

[`shadowOnly`](/documentation/SceneKit/SCNMaterial/LightingModel-swift.struct/shadowOnly)


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