Horizontal disparities seen as due to a global occluder not individual slants
(A) Cross fusion of the left and middle images give rise to a perceived phantom occluder tilted in depth. Cross fusion of the middle and right images fails to do this because the disparities are not consistent with occlusion. Slants are seen for the individual lines. For uncrossed fusion reverse these instructions.
(B) The same as A, except that the phantom occluder is curved in depth rather than tilted.