# splitIndex

> The split index of the shadow-casting light to be rendered. With the default value of -1, Unity increments the split index from 0 for shadow renderer lists that are created consecutively for the same light index with matching filtering and masking settings.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.Rendering](/engine/6000.5/script-reference/unityengine/rendering.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public int splitIndex { get; set; }
```