Hopefully I can offer enough information so that someone can figure this out. :) I had a photography studio about 20 years ago that had brick walls. I bought a material (which I need to know the name of) and attached it to the cement wall. I used it because it was easy to staple paper photography backgrounds to it. It was brown, came in 4' x 8' sheets, approximately a 1/2" thick, and sorta seemed like particle board only softer. It was great because it held the staples in and didn't crumble - but also wasn't too hard to staple paper easily to it. I bought it at the home depot but now can't find it. Any ideas what that material was?????