# ModelImporterSecondaryUVMarginMethod

> Methods for handling margins during lightmap UV generation in ModelImporter.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEditor](/engine/6000.3/script-reference/unityeditor.md)
* **Assembly:** UnityEditor

```csharp
public enum ModelImporterSecondaryUVMarginMethod
```

## Fields

| Value                                                                                                      | Description                                                                                    |
| ---------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [Calculate](/engine/6000.3/script-reference/unityeditor/modelimportersecondaryuvmarginmethod/calculate.md) | Calculate suitable lightmap UV margins based on expected lightmap resolution and object scale. |
| [Manual](/engine/6000.3/script-reference/unityeditor/modelimportersecondaryuvmarginmethod/manual.md)       | Specify pack margin manually.                                                                  |