# frictionMixing

> Defines the method used when mixing the friction values of two shapes to form a shape contact. This is assigned to the current _surfaceMaterial.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public PhysicsShape.SurfaceMaterial.MixingMode frictionMixing { get; set; }
```