Ooops, I really didn't mean to offend. The rant bit was entirely not aimed at you but rather the people who want a "one click wonder planet". I know you appreciate the difficulty of the project your taking on. But then if it was so easy ....
The detail you have in your close up shots is impressive, don't get me wrong. I meant that the ability to create a wide variety of effects will become exponentially more complex and difficult. In your images the detail has the same "character" in both shots, and this is where the difficulty comes in. To create two or three characters of terrain will be a challenging having them seamlessly blend together and to blend for some sort of "pseudo geological reason" will be difficult, to do any more will be hard in the extreme.
Maybe I'm talking about a different thing but to me a "fully procedural planet" is not just one style of terrain and texture but many blended together in a way that looks believable.
Good luck but to see a planet with a fully "earth" type of variety, with savannah, jungle, rolling hills, alpine mountains, volcanic areas, sedimentary erosions, rivers!, to name a few, (and there would have to be a great many more), and to have these areas blend together in a believable way is a huge challenge. All of these environments Terragen is eminently capable of producing (its got better and so have its users). But getting more than a few to blend together believably is something I never found a satisfactory solution to.
Its why I'm commenting, if you can crack I many others will be veryt greatful.
Go for it and again sorry if I offended.
Richard
PS: Just re-read your post and see you weren't that err.. that bothered (lol
) but I'll leave the comments anyway as I still believe its a worthy challenge.
Oh and I do re-visit the planets frequently, still looking for a working solution. I always end up using a project specific solution.