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# MTLBlitPassDescriptor

A configuration you create to customize a blit command encoder, which affects the runtime behavior of the blit pass you encode with it.

```
class MTLBlitPassDescriptor
```

## Overview

You can customize an encoder for a blit pass by creating and configuring an [`MTLBlitPassDescriptor`](/documentation/Metal/MTLBlitPassDescriptor) instance and passing it to [`makeBlitCommandEncoder(descriptor:)`](/documentation/Metal/MTLCommandBuffer/makeBlitCommandEncoder(descriptor:)).

## Topics

### Creating a blit pass descriptor

[`blitPassDescriptor`](/documentation/Metal/MTLBlitPassDescriptor/blitPassDescriptor)

Creates a new blit pass descriptor with a default configuration.

### Configuring sample buffer attachment descriptors for a blit pass

[`sampleBufferAttachments`](/documentation/Metal/MTLBlitPassDescriptor/sampleBufferAttachments)

An array of counter sample buffer attachments that you configure for a blit pass.


---

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