Any hints for how to do bump mapping?
A. Sure! Use a paint program to design bump images. Start with a black canvas and paint white shapes on it. Then, view it with xv and blur it (a lot… use a blur size of at least 7). Or, write a function that given parameter values (u,v) returns a height value or a gradiant value. Think about including a bumpScale parameter that will allow you to increase or decrease the effect the bumps have on your normal to make them easier to see.