# PrepareSimulation

> This stage prepares the physics scene for simulation.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.PhysicsModule

```csharp
PrepareSimulation = 1
```

### Remarks

Specifically, this stage:

* Displays any pending errors from the physics system.

* Calls [Physics.SyncTransforms](/engine/6000.7/script-reference/unityengine/physics/synctransforms.md) to apply any pending [Transform](/engine/6000.7/script-reference/unityengine/transform.md) changes to the physics system.

* Stores interpolation poses.