# splitExclusionMask

> A bitmask that represents the BatchCullingContext.cullingSplits Unity ignores in a BatchDrawCommand struct.

## Definition

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

```csharp
public readonly ushort splitExclusionMask
```

### Remarks

The bitmask is 8 bits. A bit value of 1 means Unity ignores the culling split. The least significant bit corresponds to the first culling split in the [BatchCullingContext.cullingSplits](/engine/6000.7/script-reference/unityengine/rendering/batchcullingcontext/cullingsplits.md) array, and each successive bit corresponds to the next culling split, up to a maximum of six bits. This means that any of the bits set to 1 in the exclusion mask do not need to be set in the splitMask either.