Scenic. Brand name for a wall material used to fill joints and add texture (joint compound). See http://www.jaxsancoatings.com/products and http://theaterhelper.com/content/view/112/9/ for more. End product sounds similar to VSSSD.
http://www.jaxsancoatings.com/uses/theatres/
http://www.jaxsancoatings.com/uses/theatres/
