Methods, apparatuses and systems directed, in one implementation, to a system of dynamically spawned, virtual, three-dimensional (3D) viewports which render transparently within the elements of, or on top of, an existing desktop display environment, allowing rendered objects to seamlessly interact and...http://www.google.com/patents/US7400322?utm_source=gb-gplus-sharePatent US7400322 - Viewport-based desktop rendering engine
