While the term Virtual Reality entered our vocabulary a mere 20 years ago, the desire for simulation and special effects have existed as long as there has been artistic representation. To succeed in making virtual effects, two major elements need to be in place: a precise production technique and a subject to perceive the effect. Virtuality, contemporary or historical, takes many forms. High-fidelity digital simulations, world maps and surveying technology, descriptive geometry, cinema and photography, and more, either digital or analog, combine into a long history of virtual technologies. The artists included in this dialog work within the realm of phenomenal perception, ungrounding our conditioned ways of seeing to create an ambiguous play between physical and perceptual space. The experience of these works is of dynamic parallax and shifting displacement, in a space that is both present and absent. Impossible space, space that can be perceived, occupied and experienced, but does not exist.