Landscape painting, and in fact most painting, has historically been treated as foreground, middleground and background. Ms. Appel's paintings, however, destroy the illusion of space. Instead, her filaments and shapes float on the surface of the canvass in a charming network of gauzy intricacies.The various ideas about how to represent three dimensional form on a two dimensional picture plane have preoccupied artists since the Renaissance. Modern painting especially has explored and redefined the representation of value in spac