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# MTLAccelerationStructureInstanceOptions

Options for adjusting the behavior of an instanced acceleration structure.

```
struct MTLAccelerationStructureInstanceOptions
```

## Topics

### Creating instance flags

[`init(rawValue:)`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/init(rawValue:))

Creates new usage options from a raw integer value.

### Usage options

[`MTLAccelerationStructureInstanceOptionNone`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/MTLAccelerationStructureInstanceOptionNone)

Specifies the default behavior for resulting acceleration structure.

[`MTLAccelerationStructureInstanceOptionDisableTriangleCulling`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/disableTriangleCulling)

An option that turns off culling for this instance if ray intersector has culling enabled.

[`MTLAccelerationStructureInstanceOptionTriangleFrontFacingWindingCounterClockwise`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/triangleFrontFacingWindingCounterClockwise)

Specifies that the instance specifies front facing triangles in counter-clockwise order.

[`MTLAccelerationStructureInstanceOptionOpaque`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/opaque)

Specifies that intersectors should treat the instance as opaque.

[`MTLAccelerationStructureInstanceOptionNonOpaque`](/documentation/Metal/MTLAccelerationStructureInstanceOptions/nonOpaque)

Specifies that intersectors should treat the instance as non-opaque.

## Relationships

### Conforms To

[`OptionSet`](/documentation/Swift/OptionSet)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`ExpressibleByArrayLiteral`](/documentation/Swift/ExpressibleByArrayLiteral)

[`Sendable`](/documentation/Swift/Sendable)

[`SetAlgebra`](/documentation/Swift/SetAlgebra)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

---

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