its just a gose it dosnt have all the colors as the rest of them and its a solid color so you cant tell were one part ends and another begins. but its a ghost. and its not metal just look closly youll see an off color. to highlight and let players know were their units are while behind things they make a single solid color or out like usualy the color of that team it is also shaped from the angle you originaly see it from. look at the ghosts and then put one under there and then it should fit just youll see more lines instead of a solid color

 im sorry if some of this dosnt make any sence. but im just trying to help