[x3d-public] KTX information (useful for teleconference today)

[Michalis Kamburelis]

I wrote a quick summary of what is KTX and why I would like to include
it in X3D specification:

  https://github.com/michaliskambi/x3d-tests/wiki/KTX

This is what I would like to discuss at today's teleconference :) My
writing is usually more eloquent than my speech, so I hope that this
is helpful :)

Regards,
Michalis