I am trying to export a VRM into an FBX to edit in Blender. To do this, I have installed UniVRM to import the VRM, and FBXExporter to export it as an FBX.
This almost works great. However, I have an issue where the resulting FBX has messed up materials. Please see below comparisons of how the materials of PlainGuy7 appear in the Unity editor, versus how they appear in Blender (Material preview selected).
What might be the cause for this? In Unity I am able to assign it the old material and that works fine but my future workflow plans are definitely disrupted by this problem.

