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Video transcript

what's the difference between motion and life what's the difference between this mechanical smile and this friendly smile it's a little hard to define but there's something about the way a living being moves that we work incredibly hard to capture with our characters here at Pixar and that something starts of a stage we call rigging hi I'm Brian green a rigging technical director here at Pixar rigging is the process of adding controls to a digital model the Lao animators to move it around an act when you look at the way a living being moves every motion we make causes a reaction in every other part of their body for instance when I smile it's not just my lips that move my cheeks bulge the skin around my eyes crinkle my chin stretches out to accommodate their motion we call this defamation and displacement oh yeah I laugh in rigging we have a toolbox of hundreds of different deformers that we can attach to the surface mesh of our characters all of them represent mathematical formers that define a relationship between the many points that are affected by the motion for instance I can start rigging Sully's mouth by adding a simple de forma call to rotate the underlying math here is trigonometry I'm going to add another tool called a repulsor this basically puffs things in and out add this to the cheeks and link them and then when we move his jaw his cheek bulges that's better but it's still just the beginning Sully's face alone uses over 500 performers and that's just his face we can take a similar approach to rigging the characters bodies to adding deformers that define a relationship between the knees and the calf the tail and the ramp or this tentacle and that tentacle after we got the physiology right we need to remember that these characters are film actors so the kind of motion that they may need to make might be a little more extreme than a regular monster so we've pushed it a little here's an extra life so they can be extra exciting on the screen you