# Sandbox.WaterBody.UnderwaterFogAttenuationDistance

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

Distance beyond the fog start that removes approximately 63 percent of background light, in world inches.
Smaller values give denser fog, independently of the screen effects and surface opacity.

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