Chapter 33. Converting Production RenderMan Shaders to Real-Time
Stephen Marshall Sony Pictures Imageworks
Introduction
Since the late 1980s, visual effects houses have used shading languages to generate convincing images for the motion picture industry. Although these shading languages are extremely powerful, the complexity they need in order to produce innovative images often leads to long rendering times. Additionally, with the demand for bigger and better effects, the complexity of these shaders increases.
If the rendering time takes hours per frame, it is critical to be able to visualize incremental changes in the least amount of time. Consequently, visual effects houses are considering real-time gaming techniques for optimized visualization. ...
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