Thanks but the images i posted above don't hold up in bigger versions unfortunately.
They would need much more work at least. This is the reason i went to a different image.
I will post that one later because i am still working on it and might use it for the VR challenge.
The ring in those images ("RINGS" and "Breaking In") is an object file actually with an image map.
But you can do that fully in Terragen with procedurals too.
If you look at the file sharing forum and search a little you may find many ready to use files,examples.
I think Dandelo and others had similar files here around.
The basic banding cloud atmo look is easy. Just use big values with much bigger horizontal values for clouds.
The problem-harder part is always when you want a certain look or more detail. For me at least

My images are easier ones in that aspect really.