Mixed Reality Toolkit 2.5.3 is a hotfix, fixing an Oculus regression in 2.5.2. The rest of these release notes match 2.5.2:
In the core layer, Mixed Reality Toolkit 2.5.2 is a minor update that addresses some issues that impact importing via the Unity Package Manager (UPM) on Mac. It also fixes a bug with boundary layers not showing up.
In the provider layer, it adds preview support for HoloLens 2 and Windows Mixed Reality immersive headsets on OpenXR.
Download
Option 1: Unity Package Manager
MRTK is available using the Unity Package Manager. For more information, please see Mixed Reality Toolkit and Unity Package Manager.
Option 2: Import asset (.unitypackage) files
Scroll down to Assets and download to a known location (typically, this is the Downloads folder on Windows 10):
- Microsoft.MixedReality.Toolkit.Unity.Foundation.2.5.3.unitypackage
- [Required if upgrading, optional otherwise] Microsoft.MixedReality.Toolkit.Unity.Tools.2.5.3.unitypackage
- [Optional] Microsoft.MixedReality.Toolkit.Unity.Examples.2.5.3.unitypackage
- [Optional] Microsoft.MixedReality.Toolkit.Unity.Extensions.2.5.3.unitypackage
- [Optional] Microsoft.MixedReality.Toolkit.Unity.TestUtilities.2.5.3.unitypackage
Once downloaded, you can set the target platform and import the desired packages using these instructions.
Getting started
To help get started using MRTK v2.5.3, please see the Documentation Portal.
The Welcome page covers software requirements and the initial steps required to use MRTK.
Release notes
Please see Release Notes for information on new features, known issues and changes.
HoloLens 2 and ARM64
There is a known compiler issue that impacts applications built for Microsoft HoloLens 2 using ARM64. This issue is fixed by updating Visual Studio 2019 to version 16.8 or later. If you are unable to update Visual Studio 2019, please import the Tools package to apply a workaround.
- [UPM] com.microsoft.mixedreality.toolkit.tools
- [.unitypackage] Microsoft.MixedReality.Toolkit.Tools.2.5.3.unitypackage
Upgrading
Please review the Upgrade Guide for guidance on how to upgrade an existing project to 2.5.3.
Note that the Tools package is now required when upgrading to a newer version of MRTK. It includes the migration tool, which automates the updating of projects assets to account for some changes in MRTK.