1-I finally got back to my computer. Thanks for the answer to my last question regarding terrain sizing. I have uploaded a TGD of a render [newby amateurish] of a scene with cumulus clouds in front of cirrus. The cumulus are flat and I can't seem to get any character to them. I am sure you have a cure.
2-What is Gl on the render node and how does have an effect?
3-I am very frustrated at having to restart TG2 every couple of minutes when I am trying to experiment with nodes. The tutorial doesn't go far enough explaining what goes with what, being it a function, shader etc. Perhaps one [or more] of you kind and knowledgable souls will write some easy tutorials for us newbies, explaining and showing how they relate to each other.