rafal

You can try Edit Material Properties LOP with the "Reference Type" set to 'reference' or 'specialize'.

MtlX Standard Surface is a MaterialX shader, which means there is a single VOP (and Karma shader node on Karma side) that represents it, so you can't dive inside to see the implementation details.

However, that shader node is implemented as a network in MaterialX: $HH/materialx/libraries/bxdf/standard_surface.mtlx

This means you could take that MaterialX file and edit it to come up with your own version of the shader. Of course, it should be named differently etc. But once you have your own .mtlx file with your own shader, you can use `mtlx2hda.py` and `mtlx2karma.py` scripts to build the VOP and Karma shader node that are needed for the shader UI in Houdini and the execution implementation for Karma.

See also:
https://www.sidefx.com/forum/topic/83604/ [www.sidefx.com]
https://www.sidefx.com/forum/topic/83563/ [www.sidefx.com]

Bypassing the Material Library should disable its cooking and therefore the translation.