I would like to create Supply Base (halfway between basic Command Center and Supply Depot)
it would have the Supply Depot actor and behave like a landed command center when out of the ground and like an immobile flying command center when in the ground; meaning that when above ground this supply depot can build SCV, load or unload units, and receive resources(minerals/vespene/terrazine) but when sinking below ground could not unload/load unit, could not build SCV nor receive resources.

If someone has tips it would be welcomed, in particular the attribute that says a structure (or unit) can be a receiving location for SCV/probe/drone getting back with minerals and vespene. I have not found where this parameter is set.

thanks

for the correct placement when building it:
-you need to modify "CUnit_PlacementFootprint" to "Footprint5x5DropOff"

for the ability to get the worker's minerals:
-edit "CUnit_ResourceDropOff" to "(1|1|1|1)"
-in the long form it should be called "behavior - ressource drop off" or something like that

You don't need the 5x5 footprint if it is for a supply depot, keep the supply depot footprint. The supply depot does a morph to lower into the ground, (switches unit) so apply the right abilities/behaviours to the right unit.

thanks I will give these a try

I guess that was used for the correct placement. Else you will be able to create 0 clutter (building the depot directly next to the mineral field).

I would suggest duplicating the supply depot footprint so and changing the placement check so that near resources is invalid then.