In the Analytical phase of their Cubism, Braque and Picasso had not only had to minimize three-dimensionality simply in order to preserve it; they had also had to generalize it - to the point , finally , where the illusion of depth and relief became abstracted from specific three-dimensional entities and was rendered largely as the illusion of depth and relief as such : as a disembodied attribute and expropriated property detached from everything not itself.