* '''[[Block_Types#Penetrable_Volumes|Penetrable Volumes]]''': feature reflection, transmission and diffraction of impinging rays. These blocks are used to model propagation inside general material media or fog, rain and vegetation.
* '''[[Block_Types#Terrain_Surfaces_vs._Global_Ground|Terrain Surfaces]]''': feature reflection and optional diffraction of impinging rays. These blocks are used to provide one or more impenetrable, ground surfaces for the propagation scene. Rays simply bounce off terrain objects.
* '''[[#Defining_Base_Point_Sets|Base Points]]''': are used to define locate a single transmitter and or receiver locations (coordinates) or arrays of transmitters or receivers in the scene.
=== Adding a New Scene Element ===