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# makeAccelerationStructureCommandEncoder(descriptor:)

Creates a ray-tracing acceleration structure command encoder from a descriptor.

```
func makeAccelerationStructureCommandEncoder(descriptor: MTLAccelerationStructurePassDescriptor) -> any MTLAccelerationStructureCommandEncoder
```

## Parameters

`descriptor`

An [`MTLAccelerationStructurePassDescriptor`](/documentation/Metal/MTLAccelerationStructurePassDescriptor) instance that configures the [`MTLAccelerationStructureCommandEncoder`](/documentation/Metal/MTLAccelerationStructureCommandEncoder) the method returns.

## Discussion

Use an [`MTLAccelerationStructureCommandEncoder`](/documentation/Metal/MTLAccelerationStructureCommandEncoder) instance’s methods to set up a single ray-tracing pass.

---

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