Quote - Hi Joe,

Have a read of this thread:
www.renderosity.com/mod/forumpro/showthread.php

BagginsBill is the wizard and mathematician of this forum. He teaches things clearly and patiently. If at first the approach seems obscure, persevere and you will see very clearly how to obtain the very best results from the material room. Follow BagginsBill's instruction to the letter and your materials will be better than 95% of all the materials in Poserdom... I guarantee it.

This link may also be of help.
he used to post frequently in the RDNA Poser Forums.

http://www.castleposer.co.uk/my_tutorials.html

http://www.castleposer.co.uk/articles/maths_intro.html

"That government is best which governs the least, because its people discipline themselves."
Thomas Jefferson