MRUK accessing the mesh of a room

Hi All,

I'm using v74 of the MRUK for my unity project. I'm on a Quest 3 and have a scan of my room. the basic sample scene loads fine out of the box.  I have a script I made that I feed a mesh and it applies materials to triangles based on their normal directions. I want to apply that to the mesh of my room using MRUK but I can't find any documentation on how to access that mesh data. Is it possible to do? I have been looking for documentation for the MRUK functions but every link I find leads me to this page which seems like a sales page.