---
title: start
framework: GLKit
role: symbol
role_heading: Instance Property
platforms: [iOS 5.0+, iPadOS 5.0+, macOS 10.8+, tvOS 9.0+]
path: glkit/glkeffectpropertyfog/start
---

# start

The minimum distance in eye coordinates before fog is applied to the fragment color.

## Declaration

```swift
var start: GLfloat { get set }
```

## Discussion

Discussion This property is ignored when the mode property is set to GLKFogMode.exp or GLKFogMode.exp2.

## See Also

### Fog Properties

- [color](glkit/glkeffectpropertyfog/color.md)
- [density](glkit/glkeffectpropertyfog/density.md)
- [end](glkit/glkeffectpropertyfog/end.md)