After some request for Avatar customization @Kalila informed me about ready.player.me website which is Vircadia ready and quite easy to produce avatars in no time.
Anyway in my community of Italian teachers some are quite proficient in making their own avatars with blender and mixamo and other utilities, which are working correctly in Unity and other virtual world experiences.
Question they have put to me yesterday: Is the usual workflow described here
Create Your Own Avatar — High Fidelity Documentation
including the avatar packager (currently the avatar packager in Vircadia goes to 404),
and the plugin for unity which can be found on tivoli page
tools/unity-avatar-exporter · d63609bedda1248c6c29a38f2b94ba0dfcbaf294 · Maki / Interface · GitLab
still valid for preparing valid avatars in Vircadia? Or is there any specialized .unitypackage or workflow specific for Vircadia?
PS. Does this GitHub - Menithal/Blender-Metaverse-Addon: Blender toolset for creating content for Metaverses like Hi still work with Vircadia as well?
PS2. Trying to directly import a fbx downloaded from mixamo gives the following error (from developer menu)