Spatial Augmented Reality tries to enhance the physical world with realtime graphical information. Instead of using a dedicated display, the environment itself acts as the projective surface. There are many applications and uses for such a technology, ranging from early prototyping to entertainment. The work described in this book brings together Spatial Augmented Reality and modern, programmable shader-based computer graphics. Rendering pipelines, material systems and high-dynamic range rendering are core parts of this work. The goal is realtime photorealistic images created with a projector- based rendering system.