So I feel this may have been answered elsewhere already but can't find it.
in Solaris I have done my lookdev using the MtlXStandardSurface shader, and on USD write I'd like to also embed the USDPreviewShader using the "Auto Generate Preview Surface Shaders" toggle on the material library node.
When I do that, it does create a usdPreviewShader but doesn't hook up the majority of textures, I think the only ones it appears to support are base_colour and roughness. Attached below is the usd file re-imported and editing the material inside - you can see the usdpreview material created but with only two of the textures, metallic being skipped.
Is there anything I might be missing to get all textures hooked up as part of the auto generation? Blender's USDPreviewSurface export option appears to collect all textures (excl subsurface etc)
Thanks!
Michael