Prop assets define 3D objects that can be placed within a scene.
Extrusion assets are used to create extruded geometry for features such as walls, guard rails, and fences.
Post assets are used for building support posts of varying height, primarily for bridges and overpasses.
Prop model assets reference external 3D model files that can be placed within the scene.
Prop assembly assets are hierarchical collections of prop instances stored as a single asset that can itself be instantiated within the scene.
Prop set assets reference collections of different props that have a random distribution.
Sign assets are used to create and edit standard and custom street signs.
Signal assets are 3D models that allow for dynamic traffic signal heads with lights.