Hi BIS. There is no possibility to see a random starting position in the editor 3DEN.
When the player tries to make the random start for any unit, it needs to use the system markers, which located in (modules/markers/system/empty) But this system marker is only visible on the 2D map of Eden.

For example, if a player wants to make a few random starts on the second floors of buildings, then the problem arises. The player does not understand where exact will start unit, because can not see the start-marker in the 3D.

Show system markers in a 3D scene also