# onBeforeRender

> An event that is invoked every frame, on all platforms, immediately before rendering.

## Definition

* **Type:** Event
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public static event UnityAction onBeforeRender
```

### Remarks

This callback runs as part of the frame loop on VR and non-VR platforms. It's commonly used for VR to sample input with minimal latency before rendering, but you can use it for any work that must run just before a frame is rendered.

Any work performed within this callback increases the latency between sampling input and rendering to the device. Keep the amount of work done in this callback to a minimum.