But the drawing does not necessarily require it. As objects architectural drawings are far more vague and unstable, with requirements that cannot be satisfied in the realm of art. The important thing is that Le Corbusier's architecture existed only in the expressive relationship and differences between drawings, photos, and buildings, or in other words in the process of translation from drawing to building and from building to photo. Precisely because architecture cannot be sufficient to itself in the form of a built work or in the form of a drawing, the possibility of its realization lies in the vague region of inter-media. It may be well for us to distinguish, with Gilles Deleuze, between possible things and virtual things.
Possible things stand opposed to real things.
Possible things undergo the process of realization. However, virtual things do not stand opposed to real things. They are already completely real in themselves. According to Deleuze, the process characteristic of virtual things is not realization but rather actualization. Possible things are produced after the fact.