Hello, here's an updated version, using the last feature from Moi5 Beta to generate proper surface ID.
That's about the third time I rebuild this tool, the execution time is almost instant, and there is no more iteration to "find" the best value.
Create the layout / udim however can still take a few second / minutes depending of the number of surfaces (using native Hou UVLayout).

https://www.youtube.com/watch?v=XbGfRWSs-uw

Build on Houdini 20.0.547