---
title: MaterialParameterTypes.FaceCulling.back
framework: realitykit
role: symbol
role_heading: Case
path: realitykit/materialparametertypes/faceculling/back
---

# MaterialParameterTypes.FaceCulling.back

The system culls back-facing polygons.

## Declaration

```swift
case back
```

## See Also

### Face culling

- [MaterialParameterTypes.FaceCulling.front](realitykit/materialparametertypes/faceculling/front.md)
- [MaterialParameterTypes.FaceCulling.none](realitykit/materialparametertypes/faceculling/none.md)