Okay figured it out. Myself.

I have xfrog and having a lot of trouble bringing the trees into terragen. None of the textures or alpha is coming in.

Please HELP!!!

Quote - I too find Xfrog quite hard to use, but I am a beginner when it comes to modeling anyway. I've been owning the Cinema 4D 10.5 Studio bundle for two years now (it's great when you are a student and can get high-end software for a fraction of its original price :-) ) and have just recently begun buying books on it and reading tutorials - I just did not have the time before. So I might not be qualified enough to give a profound statement on Xfrog's learning curve (standalone 3.5), but I find it to be quite steep and rather unintuitive. That's not to say that it's impossible to learn - it just takes a lot of patience and time, and I am pretty sure that as soon as you know your way around the package you will be able do amazing things with it.

  LastDecember Planetside software had a special Christmas sale on their website: You could get Terragen 2 Deep Edition (= with animation), Xfrog 3.5 Full (= with animation) and ALL (!) 22 Xfrog 2.0 libraries for 799 $ (excluding VAT): I wasn't so keen on learning another 3d scenery app, but I was sold by the Xfrog offer. I now have every Xfrog tree in *.xfr, *.tgo and *.vob format (it took ages to convert all those plants to *.vob) on my harddrive. That was one hell of a deal. The regular price is 999 $ - still a pretty good offer for two 3D apps and thousands of plant models :-)

I don't mean to advertise, I just wanted to point out the benefits for people who consider to buy one or more libraries.