Well I have taken the other path because as old terragen did not allow import or support any vegetation it was always missing that worldly look Vue is so good at. With the advent of TG2TP we have been able to import .obj as well as a number of other formats I don't use, but Vue exports quite nice .3ds objects which also include the necessary alpha colour and bump maps as well so I have done some of those using Vue6INF PLE as I can really only afford free stuff[hence I don't have a TG license yet] and converted them to .obj in an app called POSERay that makes an .obj that TG2TP reads quite well. I think these 2 apps work quite well together as opposed to vs. each other.
Here are a couple of renders in TG2 with Vue objects imported as said.

http://www.renderosity.com/mod/gallery/index.php?image_id=1498989&member

http://www.renderosity.com/mod/gallery/index.php?image_id=1495177&member

and this one featuring Vue Carex grass clump

http://www.renderosity.com/mod/gallery/index.php?image_id=1430055&member

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again