---
title: fresnelExponent
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnmaterial/fresnelexponent
---

# fresnelExponent

A factor affecting the material’s reflectivity. Animatable.

## Declaration

```swift
var fresnelExponent: CGFloat { get set }
```

## Discussion

Discussion The Fresnel exponent of a material interacts with its reflective property to determine the intensity of reflections in a surface based on its angle relative to the viewer. A higher Fresnel exponent increases the visibility of reflections when the material is viewed from a shallow angle. You can animate changes to this property’s value. See Animating SceneKit Content.

## See Also

### Visual Properties for Basic Shading

- [diffuse](scenekit/scnmaterial/diffuse.md)
- [ambient](scenekit/scnmaterial/ambient.md)
- [specular](scenekit/scnmaterial/specular.md)
- [reflective](scenekit/scnmaterial/reflective.md)
- [multiply](scenekit/scnmaterial/multiply.md)
- [transparent](scenekit/scnmaterial/transparent.md)
- [shininess](scenekit/scnmaterial/shininess.md)
- [locksAmbientWithDiffuse](scenekit/scnmaterial/locksambientwithdiffuse.md)