Artist Mary Lum works on her painting, which is part of the exhibit "Up Against the Wall" opening in the Ezra and Cecile Zilkha Gallery on Sept. 8. Posted 08/24/06 Up Against the Wall, an exhibit featuring art that relies exclusively on the interior surfaces of architecture for inspiration and material support, will open at the Ezra and Cecile Zilkha Gallery on Sept. 8. Organized by Nina Felshin, curator of Zilkha Gallery, the exhibition includes work by William McCarthy, gallery supervisor of Zilkha Gallery and Davison Art Center gallery supervisor, as well as artists Shoshana Dentz, Elana Herzog, Mary Lum…