Minimal mtlx file with displacement ?

[AntoineSfx]

I am looking for a minimal mtlx file with those characteristics:

uses:

mtlxstandard_surface

and mtlx_displacement

and doesn't break when edited in with Edit Material Network LOP

So far, here is what works and what doesn't :

The mtlx files from GPUOpen work (don' t break on edit), but they don't have displacement. I don't see an obvious way to add displacement

The mtlx files from, say ambientcg.com have displacement, but there are other problems: sometimes the displacement is made in an absolute direction (not in normal space, just world space), and you can't edit them easily, they break on edit, and you have to recheck some parameters in the network for it to work.

Some other material definitions (in USDC from ambientcg ) create a material network made of USD Preview Surface /  USD Texture and the displacement doesn't actually work.

I'm looking for a solution to fix either of the mtlx files; there is a nodegraph structure in the mtlx from GPU Open that is absent from the ones from ambientcg.

#1   mtlx files from GPUOpen: any mtlx file in your gpuopen directory after you' ve loaded a GPU Open material from Material Linker

#2   https://ambientcg.com/get?file=Tiles074_2K-JPG.zip