# Sandbox.Rendering.FogSetup.SunFadeDistance

```csharp
float SunFadeDistance { get; set; }
```

Distance over which sun lighting smoothly fades in. Zero gives a hard start; negative values reverse the fade.

Declared in [Sandbox.Rendering.FogSetup](/api/Sandbox.Rendering.FogSetup).
Assembly: `Sandbox.Engine`.