At the extreme right, the picture is lit by a window represented in very sharp perspective; so sharp that we can see scarcely more than the embrasure; so that the ﬂood of light streaming through it bathes at the same time, and with equal generosity, two neighbouring spaces, overlapping but irreducible: the surface of the painting, together with the volume it represents (which is to say, the painter's studio, or the salon in which his easel is now set up), and, in front of that surface, the real volume occupied by the spectator (or again, the unreal site of the model).