Step 7
nOnce you have your box down to the right size you will want to link all the other objects to it.
nTo do this turn on the link option and then click and drag each wall to the master node you merged in earlier.
nWhen you link 2 objects the dominant one will blink indicating you have linked it.
nOnce you have all the walls linked to the node open the select by name menu and turn on “Display subtree”
nIf you did it right the master node should be on top with all the others indented below. Usually it will appear like this
nMaster
–Col
–Lod0.wall
–Lod1.wall
–Lod2.wall