I've noticed there's quite a few techniques being developed for generating tornadoes, rainbows, etc.  Is it planned to integrate some of these techniques into the Terragen2 interface?  Like a "add rainbow" in the atmosphere tab.  I guess I mean a way to at least get started on a rainbow with lots of user options to "tune" it.  
Other things that come to mind are rain and waves.  I just curious if this is desirable or not.