Greg, Have a go at tonemapping NB as well. The guys at Astro Anarchy came up with it. Have a look at
this old post for a preview of what it did for one of my images and a link to the docs.
Also, have a look at
this NB 3D version of the veil from Astro Anarchy. You'll never see it the same way again.
I'm having issues identifying and using forum links with chrome on this hackintosh, hope these work.