---
title: backToFront
framework: quartzcore
role: symbol
role_heading: Type Property
path: quartzcore/caemitterlayerrendermode/backtofront
---

# backToFront

Particles are rendered from back to front, sorted by z-position. This mode uses source-over compositing.

## Declaration

```swift
static let backToFront: CAEmitterLayerRenderMode
```

## See Also

### Constants

- [unordered](quartzcore/caemitterlayerrendermode/unordered.md)
- [oldestFirst](quartzcore/caemitterlayerrendermode/oldestfirst.md)
- [oldestLast](quartzcore/caemitterlayerrendermode/oldestlast.md)
- [additive](quartzcore/caemitterlayerrendermode/additive.md)