A new building is created with standard areal building materials.
For a detailed definition of single buildings (in skp or for export to vis programs)
it is possible to
define building's materials as unique,
either for one selected building (here the new materials are extended by the building's name)
or for a selection (group) of buildings, where a randomized index will be added to the materials' names of all selected buildings (to keep the materials' names unique).
Especially for a definition of backgroud building groups the second option offers a quick way of modifying a larger group of buildings.
Finally the 'reset materials' - option offers a reset of materials for selected buildings.