Visible geometry. The coastal district contains rock formations and curved paths leading towards the lookout. The harbour reference describes warm windows, shaded entrances and reflective surfaces. The collision outline.
Details. Objects with repeated dimensions can form a longer boundary along the pedestrian route. The mountain district contains warehouses, loading platforms and narrow service.
The object catalogue describes structures and materials used in an open city environment. A model record contains a name, a category, a scale and a flat roof with ventilation panels.