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This still is from the movie "Getting Into Art", by David Ebert and diplays another example another example of a volume density function. Name the texture mapping techniques you see. Which are the 3D textures?

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All the frames in the movie "Toy Story" were rendered using Pixar’s Photorealistic Renderman. In Renderman, textures are added via the use of "shaders". Compare the horse pattern on the quilt to the wood pattern in the headboard. Which is more likely to be a 3D texture?