This looks like it was really fun to put together. There is a lot here that is very nice...the mountains don't look like much here on earth, but they don't look too weird either...maybe vaguely resembling China. Good color on the mountains, except the orange in the foreground might be a bit bright. Nice compositional lines leading the view into the picture. And I like the ragged edges on the top and bottom borders. I have never tried Bryce, so I am in no position to complain about any of the renders...except is there a way to make the shorelines of the water look more realistic? It may well be beyond the capacity of the medium.
thanks for your comment on my "arc".i like this picture.could be a painting slash photo of a landscape on another planet(am i talking about your image or mine?!1,i think there are similarities)best wishes simon