When starting 3D editor , depending on wich mods are active I sometimes am unable to see the terrain (Island) that i want to edit.
all stays black and when i insert a playable unit and press play scenario
i am able to start it and enter the scenario.
Leaving is also possible but as soon i'm back at the 3d Editor , i guess it's something with the active mods {F27258} {F27259}