Having lost the building pad, and (still) having no way to create filled elevated slabs and have the topography automatically raise up to the bottom of the slab, another option is to be able to Host Individual Toposolid Subelements to Different Levels
Currently, we can host a subelement to:
- The toposolid's Current Level
- Project Base Point
- Survey Point
- Internal Origin

But why not a specific level in the project? That way the toposolid can stay hosted to the Grade level, and then we can specify specific subelement points that are hosted to the Basement level, and others that are hosted to the Raised Slab level. That way when we need to adjust the elevation of those levels, the topography automatically (sepcifically the hosted points) adjusts with them.