# Sandbox.ParticleEffect.InitialRoll

```csharp
ParticleFloat InitialRoll { get; set; }
```

Roll given to each particle when it is emitted, added to [Sandbox.ParticleEffect.Roll](/api/Sandbox.ParticleEffect/Roll).

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