Structures

I feel that buildings are not the proper term for these structures as they will not be something a player will be able to enter.  They will more likely be small structures that could be placed on walls or player constructed sites.  The number of spaces taken up by these structures will depend on the level of the structure and will vary depending on type and level. The goal is to have each structure be unique from an overhead perspective so commanders will be able to tell what structures are in their own base as well as enemy bases.
        -Teleport
As the name suggests these will allow players and vehicles to teleport.  The level of the teleporter will dictate the size of object that can pass through

        -Supply/Store
This structure will allow players to purchase anything that can be carried with the exception of structures

        -Communications
This structure allows communication to commanders vehicles and depending on level will dictate how much of a given hex field a commander may see.  In the diagram below dark grey is 1 block high, light grey 2 blocks, and white is 3 blocks high.  Another function of this structure is that when a player interacts with it they can see the overhead map of any hexfield in which their faction has another communications structure.
        -Shield
This structure will provide decreased damage to individuals within the area of effect.  The amount of damage reduced will be a percentage of something like 25% for 1, 50% for 2, and 75% for 3.  Also as the level increases the area of effect will also increase. Also This structure will also gradually heal damaged players over a long period of time.

         -Turret towers
This structure will help in defending one's base.

-Stealth
This structure will give cover but not protection.  Any players, vehicles, and structures will not be visible to enemy forces while in the area of effect of this structure.
-Class changing station