Well Nahee, one of the good things with fractal generators, as well as with apps like Bryce or Poser and all, is, that you can explore a variety of styles and artwork. So right now I can't tell you what artwork within the fractal art I would like to do. I for sure would exhibit and sell my best fractal art, so it would be important to save a project, in order to go back to it if required. I'm grateful that Sean mentioned it - and I didn't ask, because I thought that both apps provide me with this functionality. "Most used" is not really a criteria, I just picked two that I think can help make (to me) pleasing artwork. I want to start with one or the other. That's my decision so far. It's true that I said I found the both quite popular, but I forgot to say (sorry), that from what I've seen I seem to like the artwork from both the most. I do art with Terragen. You can find it here at renderosity or at my site at http://www.basinski-net.de. But that doesn't matter to the fractal questions - it's not comparable and I do not intend to do something comparable with a fractal generator. Also, I use Photoshop to work and enhance my graphics further. So if you have that many experience with so many apps, I would appreciate if you share with me information, how the two applications I picked vary and maybe complement each other. That would help me a lot!