# Sandbox.ParticleSpriteRenderer.RefractionStrength

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

Maximum refraction offset in render pixels before the normal is applied. Alpha, depth feathering
and camera fading affect artwork opacity only, never the refraction.
Supports constants, random ranges and lifetime curves, like particle alpha.
Zero leaves the captured background undistorted. Refraction must be disabled to return to ordinary sprite rendering.

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