Hi Summerleft. Thanks for the comments. No idea what that shape is at the top of the image. Never noticed that before.
I definitely want to try this on some other shots. I was interested in seeing if it could be pulled off in Capture NX and I think it does show it's possible. I must say though that I thought the Orton effect quite suited landscape images. Do you mean a shot with more diversity in colours? Or perhaps some more vivid colours in amongst the more muted tones?