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This image was captured from the Jeffersonville, Indiana shore of the Ohio River looking west toward Louisville. It was a great evening for a sunset and I chose to ride over to Indiana to see what the Louisville skyline would look like.
I processed this single frame in NIK HDR Efex Pro 2 to enhance the colors in the sky. After adjusting the tonality to create the feeling I was looking for I returned the image to Aperture 3 for final sharpening and some additional tweaks to the definition, vibrance and recovery sliders as well as performing the final sharpening on the photo. Before sending it to NIK HDR Efex Pro 2 I applied some RAW pre-sharpening in Aperture 3 which I have discovered is a good way to start processing an image.