Engineers At Pixar Movies

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Pixar movies dazzle audiences with their beloved characters, imaginative worlds, and gripping plots. How did these computer generated wonders come to look look so real? You might think that the magicians behind these films are all animators and artists, yet these artists are also talented scientists and engineers. Although the stories told by Pixar take place in richly realized fantasy realms, the science and technology required to create those worlds have distinctly real-world origins. This is Pixar’s magic -- its power to bring imagination to life. Engineers at Pixar interweave art and science to create the intricate and beautiful worlds that we see in their movies. Using math, science, and code, the engineers create a place of wonder for …show more content…

Surfacing artists construct each aspect of an object’s appearance using computer programs called shaders. They break down a complex appearance into specific elements. One shader may define a character’s underlying color, another its texture, and yet another puts the gleam in the character’s eyes.

The most powerful tool to create surfaces is looking at how things react to light. When you shine light at a pool ball, it's a highly reflective surface. It's hard, smooth, and solid, so it keeps its shine. When looking at a tennis ball, from the way the light bounces off its fuzzy surface, you can tell that it's made of something matte and soft. You can see what characters are made of depending on how reflective their surfaces are. In Cars 2, McQueen is a new car that is extremely shiny and reflective. Engineers at Pixar can define the surface textures by using a mathematical function called bidirectional reflectance distribution function (BRDF). BRDF describes what happens when light bounces off an object back towards the camera. Does it reflect back directly? Or is it scattered? BRDF isolates the way the light interacts with the surface, so on the computer, engineers first define the color of the surface and then adjust the BRDF, making it more reflective or more dull. the BRDF tells the computer what color the surface will look like given the lights that are shining on it, as well as the position of the camera that is viewing it. If the surface is reflective, you might see a hot highlight. If it's very matte, you'll see more local colors. Before pixar had this tool, it was very hard to make a surface that didn't looked real. The technical artists could add color and texture to the characters, but their reflectiveness wasn't controllable. Now, the engineers are able to add in reflectiveness quality very finely to emulate the many kinds of surfaces we see in the world, since every

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