Currently, material groups always import into Toolbag as "Default". I do understand that Alembic does not store material information, but it does store material group names at the very least. I have tried this with several different programs (Blender, Lightwave, Maya), and they all produce the same result. Does anyone else get this issue? If so, is there a way around it? My intention was to import via FBX, then import Alembic so that it inherits the FBX surfacing (since most FBX exporters don't support point cache data).
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Blender also writes the names to the file, it creates face-sets based on the names of the materials that separate them.
So this would be a piece of feedback: to let Toolbag load Alembic face-set names instead of using 'Default' for all, so it's easier to assign Toolbag materials to them.