---
title: exposure
framework: modelio
role: symbol
role_heading: Instance Property
path: modelio/mdlskycubetexture/exposure
---

# exposure

The amount of exposure compensation to apply during tone mapping.

## Declaration

```swift
var exposure: Float { get set }
```

## Discussion

Discussion To render a sky texture, Model I/O first simulates the colors visible in the sky at different directions and then applies tone mapping to fit the resulting colors into the range of displayable values.  As part of this process, Model I/O uses this property to determine the base brightness of the texture image.

## See Also

### Working with Tone Mapping Parameters

- [gamma](modelio/mdlskycubetexture/gamma.md)
- [brightness](modelio/mdlskycubetexture/brightness.md)
- [contrast](modelio/mdlskycubetexture/contrast.md)
- [saturation](modelio/mdlskycubetexture/saturation.md)
- [highDynamicRangeCompression](modelio/mdlskycubetexture/highdynamicrangecompression.md)