# Sandbox.ModelBuilder.AddMaterialGroup

```csharp
MaterialGroupBuilder AddMaterialGroup(string name)
```

Adds a named material variant and returns a builder for its materials.

### Parameters

- `name` (`string`): The material group name.

### Returns

`MaterialGroupBuilder`: A builder for the new material group.

Declared in [Sandbox.ModelBuilder](/api/Sandbox.ModelBuilder).
Assembly: `Sandbox.Engine`.