Huh
So I went through all that trouble finding out how to get a #fbx (without using #Blender or #CATS plugin - despite how good it may be)

to realize:

#Sketchfab has:
* limited uploads
* displays #static models (not sure if I could embed an #animation
* sigh

Srsly ?

My own #webrender split off can do more than that
https://alceawis.de/mmdlatest.html

What a waste of time  
BLEH !

#DisappontedAo

The processin on #sketchfab takes forever too.
Are they struggling with my #pmx / #mmd ik bone names ?