The hardware shading language used is Cg. This chapter demonstrates that it is possible to convert a Pixar RenderMan surface shader into a hardware shader. In particular, the recent advances of graphics hardware technology and the development of hardware shading languages have offered a recognizable mapping between real-time and production effects. Consequently, visual effects houses are considering real-time gaming techniques for optimized visualization. If the rendering time takes hours per frame, it is critical to be able to visualize incremental changes in the least amount of time.
Additionally, with the demand for bigger and better effects, the complexity of these shaders increases. Although these shading languages are extremely powerful, the complexity they need in order to produce innovative images often leads to long rendering times. Since the late 1980s, visual effects houses have used shading languages to generate convincing images for the motion picture industry. Sony Pictures Imageworks 33.1 Introduction Converting Production RenderMan Shaders to Real-Time
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