USD with MaterialX file references Support?

[joao_dgg]

I don't see MaterialX marked as supported, in the Get Started page, but I've managed to create and open some basic USD+referenced MtlX files in the Substance Viewer, e.g. a Sphere or simple meshes:

However, it seems like some more complex files just end up losing or not finding the MaterialX bindings, which ends up being ignored. I can, however, open other complex scenes like the Open Chess Set just fine.

I'm curious if this is technically supported already, and, if so, if there are any known limitations or things we need to take into account, e.g. "how should a valid USD file with MaterialX references look like for it to open correctly?".

[joao_dgg]

Hi! Just pinging here again, to see if anyone has any idea.

Ideally, I would want to know how a USD asset with MaterialX references is expected to look like for it to be compatible with the viewer, if possible at all.

[joao_dgg · Accepted solution]

Posting here just in case someone comes across the same issue, but I believe I ended up finding a workaround myself. It seems like the viewer is able to find the MaterialX references *if* they are below your default prim in USD? In either case, my models seem to work now.