p372fig11.02 FACADE theory explains how multiple depth-selective boundary representations can capture the surface lightnesses and colors at the correct depths.  The fact that both surface qualia and depth are determined by a single process implies that, for example, a change in brightness can cause a change in depth.<BR>||  3D surface filling-in.  From filling-in of surface lightness and color to filling-in of surface depth.  Prediction: Depth-selective boundary-gated filling-in defines the 3D surfaces that we see.  Prediction: A single process fills-in lightness, color, and depth.  Can a change in brightness cause a change in depth? YES! eg proximity-luminance covariance (Egusa 1983, Schwartz, Sperling 1983).  Why is depth not more unstable when lighting changes?  Prediction: Discounting the illuminant limits variability.