Has anyone successfully exported an asset from Unreal to USD with a Mtlx material and read it into LOPs?
It seems to be hit and miss depending on the asset (I try to use megascans rocks for example). On the odd occasion it will make a UsdPreview material, but no real luck with the main material. The end goal would be to create environments in Unreal, then export them to Solaris when needed for rendering or interaction with characters (yes I'm aware you can just build environments in Houdini, not the answer I'm looking for).

There doesn't really seem to be any documentation on this process, or whether such a thing is fully supported - most docs seem to be about import rather than export.
https://forums.unrealengine.com/t/usd-round-trip-can-you-export-from-to-ue-perfectly/1388735 [forums.unrealengine.com]
https://forums.unrealengine.com/t/usd-and-materialx/1337085/25 [forums.unrealengine.com]
https://forums.unrealengine.com/t/usd-encoded-materialx-updated-for-ue5-6/2378503/14 [forums.unrealengine.com]

Has anyone had experience/success in this regard?