picture plane

   In perspective, the plane (a flat level) occupied by the surface of the picture — its frontal boundary. When there is any illusion of depth in the picture, the picture plane is similar to a plate of glass behind which pictorial elements are arranged in depth. Artists indicate the supposed distance of subjects beyond the picture plane through the use of changes in the sizes of things, the ways they overlap each other, and (when subjects are placed on the depicted ground, as opposed to flying above it) by positioning them on the area taken up by the depicted floor, ground, or a body of water. Abstract Expressionists worked directly on the plane itself, unconcerned with recession in depth.