I have been working on integrating draco compression support into rhino3dm and RhinoCommon.
https://google.github.io/draco/
This is a key piece to getting glTF support with the compression that people want from this format. Currently rhino3dm.js and rhino3dm.py have draco compression support and I am trying to get this into RhinoCommon. Once that is done we can further investigate glTF support.
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