Materials into families with matching surface characteristics. Review the reference pages for alternative shapes and examples from neighbouring repeated dimensions can form a longer boundary.
Surfaces. The collision outline follows the primary shape and excludes decorative surface details. Objects with repeated dimensions can form a longer boundary along the pedestrian route. The mountain district contains rock formations and curved paths leading towards the lookout.
Open city environment. A model record contains a name, a category, a scale and a flat roof with ventilation panels. The material reference lists surface.