Just try Capture NX 1.3.2 and compared it with Capture 4.4.2.
#1 is converted by Capture 4.4.2.
#2 is the same RAW image as #1, but it is converted by Capture NX 1.3.2. The background is darkened with color control points, which is much easier than Photoshop as I do not need to select the background to darken it.
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