The examples in this chapter were just the tip of the iceberg. There's so much you can do with func_tracktrain and point_camera entities. Func_tracktrains can be ridden, hidden, and targeted by other entities. Point_cameras and point_viewcontrols entities can add another dimension of depth and immersion to your worlds. Making blocks and models move is fun, but the real magic starts to happen when you add NPCs into the mix. NPC movement is next; buckle up!.