Allows the placement of entities on top of surfaces.
-  Single [Single | Surface]: Processes one Surface entity at a time.
-  Collective [Collective | Surface]: Processes all Surface entities at a time.
-  Actor [Collective | Actor]: Actors to be placed on the surface.
-  Mesh [Collective | Mesh]: Meshes to be placed on the surface.
-  Path [Collective | Path]: Paths to be placed on the surface.
- Surface [Surface]: Surface on which the entities where placed.