Folding More Standards Into OpenPBR

[jackers2024]

I think it would be great if other MaterialX-compatible texturing and rendering programs would fold their own texturing and shading standards into OpenPBR. To name several examples, ones from Pixar (RenderMan), Chaos (V-Ray), Maxon (ZBrush and Redshift), and Foundry (Mari).

This is where I learned it from.
https://learn.foundry.com/mari/Content/reference_guide/shader_parameters/aistandard_surface.html