There are many neutral color methods, the most commonly used is the hue/saturation to reduce the saturation degree. Here's another quick way to do this. General process: First simple to pull out the main color of the picture, and then use a light gray color overlay The image of the high light area, you can get a good neutral color.
Original
< small map view big picture >
Final effect
1, open the material picture, create curve adjustment layer, green, blue adjustment, parameter settings such as Figure 1, 2, the effect is as Figure 3. This step mainly adds some blue to the dark part of the picture.
< map 1>
< map 2>
< map 3>
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