The paper discusses various aspects of the waved water surface and underwater bottom video representation simulation and also expands on the math models and algorithms of the following related tasks: waved water surface simulation; calculation of reflected and refracted rays directions in 3-D space; underwater caustics (extra illuminated areas) forming; refractive distortion of the bottom view account; reflected skylight addition.
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If you haven't scene the trailers to Pixar's new movie, Nemo, go check it out at http://www.pixar.com . It is amazing at what they did