How about a vertical, camera point of view diagram tool?
This tool would show relative heights for each light, panel or head from the camera's point of view. An outline would show something behind a panel that would otherwise block the view. These would be tied to the overhead lighting diagram. When one moves something here it moves in the camera POV as well
AdminOlivier Lance (Admin, Sylights) commented
We have something in mind similar to this indeed :)