SNOISE3D

THE BOX'S MAIN HELP:

This function generates signed three-dimensional noise.
The return value will be a scalar which lies in the range [-1,1].

PP (input):

This must be a vector.  
This is the seed for the noise function.
The default is the surface intersection point.

OUT (output):

This function generates signed three-dimensional noise.
The return value will be a scalar which lies in the range [-1,1].