---
title: intensityExponent
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/arview/environment-swift.struct/imagebasedlight/intensityexponent
---

# intensityExponent

The intensity value of the light, defined on a logarithmic scale.

## Declaration

```swift
var intensityExponent: Float
```

## Discussion

Discussion An intensity factor is computed as 2^intensityExponent. The computed value modulates the native value specified in the diffuse and specular textures. Set the intensity to 0 to result in a scale factor of 1. This uses the unmodified texture’s diffuse and specular intensities.