I have just finished reading an article in Outdoor Photographer magazine about Montana, known as the Big Sky State, and it inspired me to process one of my photos in HDR and then convert it to black & white. The photo above showing the coastal hills and storm clouds is what I came up with.
I created the HDR file using a single color raw file. Using Adobe Camera Raw, I created seven separate images, each of which had an exposure change of 1/2-stop and subsequently each saved as a TIFF.
All seven TIFF copies were combined in Photomatix Pro to create the HDR color file, which I saved as a 16-bit TIFF.
Finally, I opened this file in NIK Silver Efex Pro to convert it to a black & white image using the High Structure preset and adding a yellow filter to darken the blue sky (the red filter proved to be too dark).
Technical data: f/6.3 at 1/500th sec, ISO 100.