I was watching
"46 and 2 by Tool / Presented by Aaron O'Keefe"
http://www.youtube.com/watch?v=mYKLvYGqaC0
and the room with the stones reminded me of "Regiestudio, Amadora, Portugal" from "Recording Studio Design" by Philip Newell page 170.
Turns out it's here
http://www.thetrackingroomstudio.com/index.php?page=gallery&ga=1
Multiple shape room with good size door
http://www.thetrackingroomstudio.com/popupgallery.php?gc=5&ga=1
http://www.thetrackingroomstudio.com/popupgallery.php?gc=6&ga=1
Stone room has thick foam
http://www.thetrackingroomstudio.com/popupgallery.php?gc=10&ga=1