Hey thanks Bruno!

That "Procedural Young Mountains" tutorial is very good. There have been several others about the function editor - you can find 4 in my directory of Vue tutorials from all over the web:
 http://www.art-head-start.com/escpro11/

and also check the Renderosity tutorials list:
http://www.renderosity.com/mod/tutorial/search.php

_jc  'Art Head Start' e-book: Learn digital art skills $19.95
'Art Head Start.com Free chapter, Vue tutorials, models, Web Tutorials Directory.