The RizomUV Bridge is a set of 4 different SOPs that facilitate the communication between Houdini and RizomUV.
RizomUV is an incredible piece of software specialized in generating UV data. The tutorial below goes over the different nodes and their functions.
For Houdini 17.5 the nodes are distributed with the GameDevelopment Toolset
GameDevelopment Toolset Installation Instructions
For Houdini 18.0 the nodes are distributed with SideFX Labs.
The RizomUV Software is required to run these nodes successfully. You can buy a copy or download a 30 day evaluation from Rizom Lab's website.