A collaboration between Pixar Animation Studios and Khan Academy. Sponsored by Disney. About Image Community Questions Start here! Overview of Pixar in a Box for students & teachers. Animation Explore how animators bring characters to life using linear & cubic interpolation. Environment modeling Explore how parabolic arcs are used to create realistic blades of grass. Character modeling Explore how clay models are transformed into digital characters using weighted averages. Crowds How was combinatorics used to make swarms of robots in WALL-E? This topic explores combinations, permutations & the binomial coefficient. Grade level: 5+ Rendering Explore how pixels are painted digitally using algebra. Sets Explore how sets are arranged using geometric transformations.