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# MTLLoadAction

Types of actions performed for an attachment at the start of a rendering pass.

```
enum MTLLoadAction
```

## Topics

### Load actions

[`MTLLoadAction.dontCare`](/documentation/Metal/MTLLoadAction/dontCare)

The GPU has permission to discard the existing contents of the attachment at the start of the render pass, replacing them with arbitrary data.

[`MTLLoadAction.load`](/documentation/Metal/MTLLoadAction/load)

The GPU preserves the existing contents of the attachment at the start of the render pass.

[`MTLLoadAction.clear`](/documentation/Metal/MTLLoadAction/clear)

The GPU writes a value to every pixel in the attachment at the start of the render pass.


---

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