Maybe our perception of photons is influenced by its phase. The second polarizer shifted all photons beyond \(180^o\) phase and we don't perceive them.
A third polarizer pushes some photons back beyond \(0^o\) phase and once again become perceivable; hence a brighter region.
This would suggest that by pushing photons reflected off any body to the negative phase (\(\gt 180^o\)), it is possible to 'phase' it out of view. Invisibility!
