Calculus in 3d Vector Graphics?

May 2010
I'm working on a Calculus Project for school and I am supposed to relate the topic to something calculus related. I decided to do the project on Super Smash Brothers Brawl and I found out that the characters were designed using 3d vector graphic technology (correct me if I am wrong). Now I would assume that 3d vector graphics would use integrals for things like coloring in the surface of the character so that the character would become brighter as he moved toward a light source.

Basically, I need a way to either confirm my thoughts or to get new ideas to relate 3d vector graphics to calculus. I've tried googling a few things but I must not be searching the right things because I'm not finding much...

And I'm new here, so please bear with me if this isn't the right place to ask this type of question...

Thanks in advance for your help.