Hi Alice,
It looks like your previous message may not have posted. But, as you may have already noticed, a few resources aligned and we were able to revisit support for AR HMDs earlier than expected. Those changes have now been merged as of vtk-js#2824 and the HoloLens 2 headset will be available in the next vtk.js release.
Once the vtk.js example website refreshes (around 30 minutes from now) you should be able to launch any of the vtk.js VR examples in the Edge browser on your HoloLens device. In testing the volume rendering examples can be a bit heavy for the mobile processor, so I would recommend starting with the “VR” or “GeometryViewer” examples.
Please update with a screenshot here if you continue to experience issues with the HoloLens headset. You can take a screenshot on the HoloLens 2 by pressing both volume buttons at the same time.
Thanks!