True Impostors offers an efficient method for adding a large number of simple models to any scene without having to render a large number of polygons. The technique utilizes modern shading hardware to perform ray casting into texture defined volumes. To achieve this, a virtual screen is set up in texture space for each impostor and inherits the same camera dependent orientation as the impostor....

The Renaissance architect, moral philosopher, cryptographer, mathematician, Papal adviser, painter, city planner and land surveyor Leon Battista Alberti provided the theoretical foundations of modern perspective geometry. Alberti’s work on perspective exerted a powerful influence on painters of the stature of Albrecht Dürer, Leonardo da Vinci and Piero della Francesca. But his Della pittura of ...