I'm sometimes interesting in having custom slab or roof, to edit a 3d solid. In mi case to edit the properties of materials of the layers in a vault. So that it can be seen in a section.
If you create now the vault using Rhino surfaces and you offset those surfaces to create different layers, all them will appear in VisualARQ section views.
In the 1.8 version you will be able to assign section attributes to Rhino surfaces, so those attributes will be shown in the the Section views.
Besides that, we are planning to create slabs and roofs with layers, in the same way as VisualARQ Walls have. But that only will happen after the 1.8 version.