p384fig11.18 Surface and surface-to-boundary surface contour signals that are generated by the Venetian blind image.<BR>||  Venetian blind effect (Howard, Rogers 1995). Every second bar on L in same position as every third bar on R.  PERCEPT: 3-bar ramps sloping up from L to R with step returns. [V1 binocular boundaries -> V2 initial boundaries -> V2 final boundaries -> V4 surface] cart [very near, near, fixation plane, far, very far]