Editing Software Adobe Photoshop CC (Windows)/Photomatix Pro
File Format RAW
Notes I used a Little Stopper ND filter to create the ethereal look of the falls and Photomatix deghost feature to freeze the sky and leave a little texture. I stopped at the 32 bit radiance file before tonemapping and opened into ACR and postprocessed the image as a single full tone image then opened in Photoshop and finished processing as a 16 bit image.
Upper Kirkjufells waterfall