# Sandbox.ModelBuilder.WithHullBounds

```csharp
ModelBuilder WithHullBounds(BBox bounds)
```

Sets the bounds used for physics and gameplay queries.
If not set, the bounds are calculated from the model's physics data.

### Parameters

- `bounds` (`BBox`): The model-space hull bounds.

### Returns

`ModelBuilder`

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