[x3d-public] MaterialX and glTF PBR

[Joe D Williams]

You can view the Chess Set in the Web MaterialX viewer here:

https://academysoftwarefoundation.github.io/MaterialX/

Pick material: standard_surface_chess_set.mtlx

Pick geometry: chess_set.glb

OpenPBR spec: https://academysoftwarefoundation.github.io/OpenPBR/ 

from MSF 3D Asset Interoperability using USD and glTF working group
feature MaterialX status and glTF PBR status and collaborations 
Continued serious work on Shader Translation Graphs to map between models.

Thanks,
Joe