Wow, great tricks you introduce here! I am going to take a closer look at
them and see if I can apply them in general to my isosurfaces cause they all
tend to render slower on Pov3.5... I admit, I'm not so skilled in math as I
would like to be.
Hugo
> optimization of the function gives us much faster rendering speed> in some cases.>> Try following code.>> R. Suzuki
