Fill gap between wood stud wall and closed cell foam or fill the stud bays?
...walls in my baserment with 2.25" of close cell spray foam on the concrete walls. The stud walls are 3-5" " from the close cell spray foam. I can either (try to) pack the void between the wall and the uneven surface of the closed cell spray foam, leaving the stud bays empty, or leave the air gap beween the stud walls ...