com.unity.xr.openxr 1.16.0-pre.1 Package Notes

Added support for OpenXR features to define the OpenXR API version required to fully function.
Added members to the `XrStructureType` enum. `XrStructureType` now contains all OpenXR values as of OpenXR version 1.1.49.
Added support for multiple OpenXR features to define a custom loader and define the OpenXR API version that is supported by the feature's loader.
Added the [OpenXR native API](xref:openxr-native-api) with initial support for the following extensions:
- `XR_EXT_future`
- `XR_EXT_spatial_anchor`
- `XR_EXT_spatial_entity`
- `XR_EXT_spatial_marker_tracking`
- `XR_EXT_spatial_persistence`
- `XR_EXT_spatial_persistence_operations`
- `XR_EXT_spatial_plane_tracking`
Added `RenderTexture` support for Composition Layers.
Added class `MockOpenXREnvironment` and `MockOpenXREnvironmentSettings` for testing low-level runtime functionality using the Mock Runtime feature.
Added [PollEventRouter](xref:UnityEngine.XR.OpenXR.NativeTypes.PollEventRouter), a new type that allows you to subscribe to `xrPollEvent` events.
Added feature to enable Automatic Viewport Dynamic Resolution for compatible devices. Refer to [Automatic Viewport Dynamic Resolution](xref:openxr-automatic-dynamic-resolution) for information.
Added MSAA support for Windows+Vulkan builds.

Changed OpenXR loader version to 1.1.49.
Changed sample count of SwapchainCreateInfo to 1 as default instead of recommendedSwapchainSampleCount returning from the runtime.
Updated minimum supported version from 2021.3 to 2022.3.
Changed the OpenXR Validation for the minimum Android API level to only apply to Unity 6.2 and older versions.

Removed the validation warning to enable the OpenXR package if an OpenXR feature is enabled. Instead, OpenXR validation will only run when the OpenXR loader is selected as active loader.
Remove HoloLens documentation as Unity has deprecated its support. Refer to the public announcement for more information.

com.unity.xr.openxr 1.16.0-pre.1