While I realize that TG2 is still vary much in development, while using the Tech Preview I realized that there seems to be a lack of tool tips in the interface.
In 0.9.43 when you hovered you mouse over some thing a tool tip was displayed telling you what that feature was for and this seamed to be global throughout the application, TG2 needs to follow this application consistency path.
I would suggest that the Tool tips be linked to the help system with further information been available here on the forum, akin to the help system available for the nodes in World Machine.
Given the sophisticated nature of TG2 with its vastly more complex feature set it is vary easy for people to get lost in the interface, and this expanded tool tips system should help to overcome this.
This is going to be true for people who have yet to discover Terragen for the first time for who TG2 will be their first version, it will also be true for when future (As yet unwritten) versions of Terragen are released with vastly more and exciting features are released in the future.
The Tool tips system in future versions of Terragen could be crossreferenced to provide a greater understanding of not only the feature in question but related features and settings.
Regard to you.
Cyber-Angel