"Its great we are discussing this here. Also its refreshing to have others participating in finding good solutions."

Yes - 2 brains are at least 3 times better than 1 :)
It would have taken me ages(if at all) to figure out my problem of the missing '-0.8' on my own...

"Sounds like you have quite a profound understanding of the function editor. That`s good to know..."

profound...no, I wouldnt go that far, but I do like it.

"Just checked out your positioning method and it works fine too. You`re right, defining a position instead of a distance makes sense.
What I also like about your version is that you do not have to "convert" the value for the texture map node, just change the sign."

Oh you so much faster than me...I didnt get to doing it yet, so its encouraging

"Now we can go ahead and add a couple more heightfields :-)"

I'm trying to sort it out so all the conversions are done automatically and the user only needs to define scale and offset (or position).   Then I'll see if I can make it into a meta-node, I havnt used those yet. But if I/we can do that, than extending it to extra features will only involve adding one meta node(with the associated values) and a blender node. Should be easier for people who arnt that keen on complicated functions

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/