Going back a couple of years, raytracing, particularly raytraced reflections, was nothing more than a fake simulation with the shadowmap users whereas the term "Refractions" were arousing just a simple question: “Is it possible?”. But today we have state-of-the art rendering engines which are available both as standalone and bundled rendering solutions for major 3d software applications aiding the 3d artists to create hyper realistic imagery. If you are dealing with 3d rendering, you probably have heard of the “Occlusion” method. In the Siggraph 2002 presentation “Production-Ready Global Illumination”,  ILM Technical Director Hayden Landis tells about this alternate method they developed for simulating GI effectively with speed.  

View this free videotutorial, are 3 different lessons,  tech how illuminate an interior without global illumination in maya 8.5 and mental ray.

 lesson 1  show the polygonal creation modeller of room

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  lesson 2  show scene setup before shading 

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lesson 3  create basilar shading and lights for illumination  

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