Supervising director David Silverman was aiming for something better than the computer animation. The animation was provided by Pacific Data Images (PDI) and overseen by David Reilly. The animators at PDI worked closely with the normal animators on The Simpsons and worked hard not to "reinvent the character[s]". The animators storyboarded the segments and showed the PDI animators how they would have handled the scenes. While designing the 3D model of Bart, the animators did not know how they would show Bart's hair. However, they realized that there were vinyl Bart dolls in production and purchased one to use as a model. One of the most difficult parts for the PDI animators was to make Homer and Bart move properly without making them look robotic. One of the key shots in the segment was where Homer steps into the 3D world and his design transitions into 3D. Executive producer Bill Oakley considers the shot to be the "money shot" and had a difficult time communicating his idea to the animators. An edited version of Homer3 appeared alongside several other shorts in the 2000 American 3-D animated anthology film, CyberWorld shown in IMAX and IMAX 3D. Background jokes Several background jokes were inserted into "Homer3". The PDI animators inserted a Utah teapot, which was the first object to be rendered in 3D, and the numbers 734 (which on a phone pad correspond to PDI). Several math equations were also inserted in the background. One of the equations that appears is 178212 + 184112=192212. Although a false statement, it appears to be true when evaluated on a typical calculator with 10 digits of precision. The answer is incorrect by approximately 7 x 1029. If it were true, it would disprove Fermat's Last Theorem, which had just been proven when this episode first aired. Cohen generated this "Fermat near-miss" with a computer program. Other equations that appear are Euler's identity and P = NP which is a reference to the famous P vs NP problem, and similarly contradicts the general belief that in fact P ≠ NP. The code 46 72 69 6E 6B 20 72 75 6C 65 73 21 is a string of hexadecimal numbers that, when interpreted as ASCII codes, decodes to "Frink rules!". There is a signpost with x, y, and z, and many basic shapes littered across the screen. While wandering around, Homer walks past a building that