OpenCities Map contains tools
to work with
MicroStation 3D solid objects, primarily for urban
modeling. These tools convert solids to 3D polygon features and back to solids.
3D polygon features can be polygon collections. To properly represent these 3D
polygon features:
-
The feature must a polygon collection.
-
Toggle on the Lock mode for the Delete to Parent
propagation rule.
This way, the operation of this lock can be adjusted
during editing by using the Graphic Group lock.