Some of these were with a Haida 10-stops ND filter. All were processed with open-source software (mostly MuminanceHDR, Digikam, ImageMagick, UFRaw and GIMP)
Northsea pre-sunset by newmikey, on Flickr
Mad sky color by newmikey, on Flickr
Windmill in twilight by newmikey, on Flickr
Northsea pre-sunset by newmikey, on Flickr
Mad sky color by newmikey, on Flickr
Windmill in twilight by newmikey, on Flickr