I really love Vue.  Some of the stability issues make it fairly undesirable to me, but it can't be any worse than, say, Bryce.

I am still in the getting the hang of it stage; I have a render right now I am really proud of, but my installation seems to have crashed, then blown itself up.  Will reinstall later, at least.

I have a few years previous experience with Terragen, so it's trying to take what I've learned there and transfer it to another program (or, how to arrange the landscape so it looks real pretty-- I'm getting better.  I'm pretty okay with skies, though, from Terragen.)

Too bad I'm completely bad at modeling.

Still don't see much need for a Vue->Lux exporter.