In this bold rewriting of visual culture, Brooke Belisle uses dimensionality to rethink the history and theory of media aesthetics. With Depth Effects, she traces A.I.-enabled techniques of computational imaging back to spatial strategies of early photography, analyzing everyday smartphone apps by way of almost-forgotten media forms. Drawing on the work of Maurice Merleau-Ponty, Belisle explores depth both as a problem of visual representation (how can flat images depict a voluminous world?) and as a philosophical paradox (how do things cohere beyond the limits of our view?). She explains how today's depth effects continue colonialist ambitions toward totalizing ways of seeing. But she also shows how artists deploy dimensionality to articulate what remains invisible and irreducible.