MRTK-Unreal is not a single package. You can download and use each component in MRTK-Unreal individually. The first component being made available is UX Tools for Unreal and the second is Graphics Tools for Unreal.
Please take a look at the links in the Further documentation section.
Different components may support different platform/device combinations. In general, support for HoloLens 2 development is the primary priority but the long term goal is to support Mixed Reality development for different devices and platforms, using the platform abstractions available in Unreal Engine and complementing those when necessary.
Note that Unreal Engine does not support HoloLens 1 devices.
UE 4.23.0 or later is needed to develop for HoloLens 2, and UE.25.0 or later to use any component in MRTK-Unreal.
Please refer to the documentation for each component for more specific details.
How does MRTK-Unreal relate to MRTK-Unity?
Both projects provide developers with additional tools to develop Mixed Reality applications using their engine of choice, and both efforts are being driven and developed by the same teams in Microsoft.
Architecturally, they differ in the fact that MRTK-Unity is an actual Unity plugin containing a large set of features, while MRTK-Unreal is being developed as a set of independent plugins, each focused on a reduced feature set.
In terms of maturity, MRTK-Unreal is at a far earlier stage than MRTK-Unity: for most components, breaking changes between releases are expected, as new features, use cases and platforms are accommodated.
Please refer to the contribution guidelines of each component in MRTK-Unreal. We always welcome bug reports, suggestions and feature requests. We would also love to see what you create with it!
Generally, we are not in a position to accept code contributions due to the early stage of the project and the likelihood of breaking changes and code conflicts arising with changes being developed internally by Microsoft and/or Epic.
We love to see what you’ve created! Please reach out to us on Twitter at @MxdRealityDev or use the #mrtkUnreal tag