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 …
Bart's hair
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. Bill Oakley considers the shot the "money shot" and had a difficult time communicating his idea to the animators.