The shot itself consists of 3 horizontal frames all shot in manual mode with a polarizer, a Lee 0.6 hard gnd and a Lee 0.6 soft gnd attached in front of the lense. normally it's not good to use a Polarizer when shooting panoramas but here that's no problem since the sky was completely coverd with clouds and there no harmfull tonal gradients would show with the polarizer. Also I had it turned so the reflections in the lake were maximized and there would be no break in the reflections which could make stitching the panorama harder.
For postprocessing I used a new technique during the raw conversion. Did you ever use the camera color profiles in Lightroom or Camera Raw. I did a little blogpost on it together with a review of some additional profiles you can get for Lightroom ->http://mibreit-photo.com/blog/?p=763. You'll find a link to the PSKiss Color Profiles in my blogpost.