The Online POV-Ray Tutorial
Normal Exploration Tool
This tool is designed to let you experiment with different values of
different normals.
To experiment with a parameter, select an option from the menu below and press
"Select". Viewing "collectively" will show you all the possible images you can view
and allow you to select from them. Viewing "individually" will show you
an image and allow you to vary the amount of the normal modifier. The
images we have here do not represent the only allowable values for these
parameters, we just chose a range of values so you could get a feel for
how the parameter changes the object.