# ComputeDetailCoverage(int)

> This function computes and returns the coverage (how many instances fit in a square unit) of a detail prototype, given its index.

## Definition

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

```csharp
public float ComputeDetailCoverage(int detailPrototypeIndex)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): 

### Returns

| Type                                                          | Description |
| ------------------------------------------------------------- | ----------- |
| [float](https://learn.microsoft.com/dotnet/api/system.single) |             |

### Remarks

Computes detail coverage. In  [DetailScatterMode.CoverageMode](/engine/6000.0/script-reference/unityengine/detailscattermode/coveragemode.md), this coverage represents the number of scattered instances per unit squared, based on the detail prototype's size and density settings. Unavailable in [DetailScatterMode.InstanceCountMode](/engine/6000.0/script-reference/unityengine/detailscattermode/instancecountmode.md).