When an object photographed approximates the recording ability of a negative, it is in a condition that we can refer to as the threshold of detectability. In this condition, the materiality of the object represented (the concrete roof/hole) and the materiality of the surface representing it (the surface of the negative/silver salt grains) should be considered both as presence and as representation.

Marx's 'metabolic rift'

... it is precisely because architecture is so strongly bound up in the circulation of capital—used as an instrument of racial segregation, demanding massive extraction of resources, mobilizing and disciplining human labor, and reifying regimes of private property—that architectural discourse offers a crucial lens to document spatio-political struggles, and to connect them.