Nineteenth-century drawings were constructed orthographically and rendered obliquely. In order to render the drawing, a choice needed to be made in which direction and to what degree to project the depth of all things onto themselves. Now if those guys looked at our rendering software today, they would find it useless. It does not project obliquely, but always in perspective, based on camera settings. Rendering shifted from abstraction to an environmental effect, resulting in an irreconcilable gap, such that a drawing and a rendering can no longer coexist as a single image. One is objective, the other subjective. Rendering something objective...