Occlusion platform support

Occlusion is supported on the ARCore, and ARKit platforms, as shown in the table below:

Provider plug-in	Occlusion supported	Provider documentation
Google ARCore XR Plug-in	Yes	Occlusion (ARCore)
Apple ARKit XR Plug-in	Yes	Occlusion (ARKit)
Apple visionOS XR Plug-in
Microsoft HoloLens
Unity OpenXR: Meta
XR Simulation

Check for occlusion support

Your app can check at runtime whether a provider plug-in supports occlusion on the user's device.

Use the example code below to check whether the device supports occlusion:

void Start()
{
    if (LoaderUtility
            .GetActiveLoader()?
            .GetLoadedSubsystem<XROcclusionSubsystem>() != null)
    {
        // XROcclusionSubsystem was loaded. The platform supports occlusion.
    }
}

Note

This example code assumes that your app has already initialized XR.

By default XR initializes automatically when your app starts, but this is configurable via Project Settings > XR Plug-in Management > Initialize XR on Startup. Refer to the XR Plug-in Management End-user documentation for more detailed information about managing the XR Plug-in lifecycle.

Optional features

The following table describes the optional features of the XROcclusionSubsystem. The Descriptor Property column provides the relevant property of the XROcclusionSubsystemDescriptor. The Description column defines the property. Refer to AR Occlusion Manager component for more information about the types of depth image described.

Feature	Descriptor Property	Description
Environment Depth Image	environmentDepthImageSupported	Whether the subsystem supports environment depth image.
Environment Depth Confidence Image	environmentDepthConfidenceImageSupported	Whether the subsystem supports environment depth confidence image.
Environment Depth Temporal Smoothing	environmentDepthTemporalSmoothingSupported	Whether temporal smoothing of the environment image is supported.
Human Segmentation Stencil Image	humanSegmentationStencilImageSupported	Whether a subsystem supports human segmentation stencil image.
Human Segmentation Depth Image	humanSegmentationDepthImageSupported	Whether a subsystem supports human segmentation depth image.

Optional feature platform support

Occlusion providers may choose whether to implement any of the optional features of AR Foundation's XROcclusionSubsystem, as indicated in the following table:

Feature	ARCore	ARKit
Environment Depth Image	Yes	Yes
Environment Depth Confidence Image	Yes	Yes
Environment Depth Temporal Smoothing	Yes	Yes
Human Segmentation Stencil Image		Yes
Human Segmentation Depth Image		Yes

Check for optional feature support

Your app can check at runtime whether an occlusion provider supports any optional features on the user's device. The XROcclusionSubsystemDescriptor contains properties for each optional feature that tell you whether they are supported.

Refer to the following example code to learn how to check for optional feature support:

void CheckForOptionalFeatureSupport()
{
    // This is inefficient. You should re-use a saved reference instead.
    var manager = Object.FindObjectOfType<AROcclusionManager>();

    // Use manager.descriptor to determine which optional features
    // are supported on the device. For example:

    if (manager.descriptor.environmentDepthImageSupported == Supported.Supported)
    {
        // Environment depth image is supported.
    }
}

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