Cannot load materialx graph

[fire]

https://github.com/AcademySoftwareFoundation/MaterialX/blob/main/resources/Materials/Examples/GltfPbr/gltf_pbr_boombox.mtlx

[fire]

1. Install usd hydra https://github.com/GPUOpen-LibrariesAndSDKs/BlenderUSDHydraAddon/releases/tag/v1.1.1
2. Install blender 3.2
3. Enable
4. Import materialx
5. No change.
6. Cannot put material on the mesh in blender.

[VascoPi]

Hi,
The implementation of the glTF PBR material has been added since MaterialX 1.38.4 (Add glTF PBR #861)
Currently, BlenderUSDHydraAddon supports MaterialX 1.38.0.

[bsavery]

@VascoPi please make a task to update to latest MaterialX

[VascoPi]

Sure, here's the ticket.

[VascoPi]

Quick review.
I was successful in building HdRpr using MaterialX v1.38.4.
Importer and render (Full and Interactive) work well, at the moment no issue is observed.

A discussion with HdRpr devs is needed to update MaterialX version.

[VascoPi]

@bsavery
An approach without updating MaterialX version, adding a single file gltf_pbr.mtlx and generating mx classes work as well.

[fire]

Can you post some instructions and sample blend project files?

I wanted to tell others this workflow works today without release, and whenever the version is updated, we can forward update.

[VascoPi]

Here's the blend scene.
gltf_pbr_blend_scene.zip

Here are the files you need to put into BlenderUSDHydraAddon_1.1.1_Blender_3.1_Windows.zip before installing the addon.
gltf_pbr_materials.zip
copy gltf_pbr.mtlx -> BlenderUSDHydraAddon_1.1.1_Blender_3.1_Windows.zip\hdusd\libs-3.10\libraries\bxdf
copy gen_gltf_pbr.py -> BlenderUSDHydraAddon_1.1.1_Blender_3.1_Windows.zip\hdusd\mx_nodes\nodes\

[fire]

@VascoPi When will this be in a new version of the BlenderUSDHydraAddon?