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# MTLAccelerationStructureDescriptor

A base class for classes that define the configuration for a new acceleration structure.

```
class MTLAccelerationStructureDescriptor
```

## Overview

This is the base class for other acceleration structure descriptors. Don’t use this class directly. Use one of the derived classes instead, as [`MTLAccelerationStructure`](/documentation/Metal/MTLAccelerationStructure) describes.

## Topics

### Specifying usage options

[`usage`](/documentation/Metal/MTLAccelerationStructureDescriptor/usage)

The options that describe how you intend to use the acceleration structure.


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