Volume rendering of walkthrough parcellation map fails

[vijayiyer05]

In the current walkthrough example, the call to visualize for a ParcellationMap object at line 47 fails in MATLAB Online (on my Chorme & Edge browsers) with the warning:

Warning: The HTMLSource may be referencing unsupported functionality or may have a JavaScript error. Refer to the documentation for known limitations.

This may reflect a limitation of using volshow on MATLAB Online, but the warning message is not making it clear. Capturing it here as a siibralab issue until the source is better pinned down.

@valentin-pinkau @xgui3783 : any insights/ideas (and/or reproductions/workarounds) are welcomed.

[valentin-pinkau]

The visualize call works for me locally on a mac. I don't know why it does not work in matlab online.

[vijayiyer05]

Thanks @valentin-pinkau, I've updated title to reflect this is scoped to MATLAB Online.
This Issue is for future posterity (and in case any ideas come to mind now).
It's interesting to me that the 3D rendering system works (in MATLAB Online) within the earlier orthoslice region view, so it seems there may be hope.