About the Map
This map is the interior of a warehouse used for experimental technologies development and testing. They find helpful NPCs who can work on upgrades to their gear and tech. featuring a helicopter drone, a UGV, a solar powered transport truck, and a linear device that seems to be having tests of something (I’ll leave that one for you to decide).
Tips From the Map Maker
While most of the warehouse itself is military themed in nature, you could also construed some background of this warehouse being an underground weapons R&D facility, or some kind of military installation elsewhere.
Brass Badger Workshop provides us with some great flooring in this map. I also used the double yellow line from the roads pack in an interesting way. They lines actually mark the massive rolling scaffold that can travel up and down the warehouse. The rest of the assets can be taken from image compositing in Arma 3.