To create the image above I started with an in-camera pan blur of a stand of trees inside Olympic National Park. I moved my camera horizontally with a slight diagonal. My shutter speed was 0.6 seconds. In the field I played around with many different camera movements and really liked the way this one was looking on the back of my camera. Almost all pleasing blurs have a reduced contrast look (see original below) and are in need of some post processing tweaks.
To process the image I began by making my usual Lightroom adjustments, including fixing the white balance, setting the white and black points (to set the white and black points I hold my Alt/Option Key down and click and drag the white slider to the right until I see something show up on the black screen, I do the same for the black but move the slider to the left). Next I adjusted the shadows, highlights and clarity.
Then I brought the image into Photoshop and duplicated my layer and applied a bit of motion blur to the top layer. To do this I went to Filter> Blur> Motion Blur. When the dialogue box opened I set the angle to 90 degrees and moved the slider on the bottom (distance) to about 1000 pixels. This helped to soften some of the lines. After looking at it against the original (by turning the eyeball of the top layer off and on) I reduced the opacity considerable to taste then I used a layer mask to bring back a bit more detail in areas that I liked-mainly the greenery. Final tweaks included applying my Nik Color Efex Pro Recipe of 25% Detail Extractor and 25% Tonal Contrast to the image.
To set up my 25-25% recipe in Nik Color Efex:
Open your image in Nik Color Efex and click on the words Detail Extractor on the left hand panel and adjust the opacity to 25% -to do that go to the tiny arrow in front of the words Control Points (on the right side panel) and click the arrow - that will open up the opacity slider, after adjusting the opacity hit ADD FILTER. Next apply 25% of Tonal Contrast (the same way) and hit SAVE RECIPE instead of add filter. A dialogue box will open prompting you to name your recipe, I name it 25-25. Your new recipe will be listed in the recipe folder shown at the bottom on the left hand panel.
Before post processing-cropped from original