I have been watching a number of YouTube videos recently on Nuke, and it has a very useful node called the Dot Node that is placed on the node connection lines to keep the graph in nuke tidy looking to prevent crossing node lines that make the visual flow of the node graph other wise hard to read. Terragen currently has no such way of node line organization making the current node graph within terragen visually hard to read, this is particularly true with complex node networks do to the current node connection lines having no handle's of any kind to modify there position.
Thus, you have the problem of node lines crossing over others and worse over other nodes: this creates a node graph that is hard to read in terms of graph direction and could lead to confusion if that scene where handed off to another artist, there is also the secondary of graph aesthetics as a matter of professional pride.
Not in any great hurry for this, but it or something like it would be nice in some future update!
Regards to you.
Cyber-Angel