More info here
Script for converting workspace materials to different instancing types (None, Object and Scene), convert compiled(base object) to open(compound object) D3D materials, convert D3D materials to Yafaray and Indigo materials.
persistent base install v3 required
requires Clintons3D Package v.1638455 or higher (Aug 26 2024 release) - Clintons3dPlugin.rsx
A version comes pre-installed in the Unofficial trueSpace Updates the button can be found in the D3D material editor panel - https://www.united3dartists.com/forum/viewforum.php?f=55
UU version has a different UI. It has a Material Utilities button
and what looks like a panel to select and load a scene instanced material into the material editor.
Some UU material nodes have default value nodes and extra UI elements.