In this article, I argue that paintings are transformations of the perceptual world, transformations that the world itself elicits but does not determine, thus undercutting the subjective-objective divide in art. First, I describe Maurice Merleau-Ponty's notion of institution, according to which sense develops only by changing, that is, by being taken up and coherently deformed. Next, I use this notion to argue that paintings develop the perceptual sense of the world by coherently deforming it. In other words, paintings are transformations of the perceptual world that are called for by the world itself. To make my case, I analyze Susan Rothenberg's painting Three Heads, a work that develops and furthers the perceptual sense of horses only by taking it up and changing it. Finally, I suggest that this view of painting motivates an interactive ontology according to which things are not self-contained but interactive, fundamentally opening onto things beyond themselves.