# Sandbox.PolygonMesh.ThickenFaces

```csharp
bool ThickenFaces(IReadOnlyList<FaceHandle> faces, float amount, out List<FaceHandle> outFaces)
```

### Parameters

- `faces` (`IReadOnlyList<FaceHandle>`)
- `amount` (`float`)
- `out outFaces` (`List<FaceHandle>`)

### Returns

`bool`

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