Behavioral and Brain Sciences

Short Communication

Spatial phenomenology requires potential illumination

James A. Schirillo a1
a1 Department of Psychology, Wake Forest University, Winston-Salem, NC 27109 [email protected]


Collapsing three-dimensional space into two violates Lehar's “volumetric mapping” constraint and can cause the visual system to construct illusory transparent regions to replace voxels that would have contained illumination. This may underlie why color constancy is worse in two dimensions, and argues for Lehar to revise his phenomenal spatial model by putting “potential illumination” in empty space.