If there is no change visually, then you did everything right.
You can check if you have done everything right by turning on the background layer (the locked one) and then turning it off and on the group with the two layers for frequency separation.
That will blend the Texture layer with the Tone layer to achieve the exact result as the original image. On the Texture layer you should put Linear Light as blending mode. That is the power of frequency separation. Thus, instead of heal brushing it to death and hope that the texture won’t be messed up, you can affect only the tonality without ever touching the texture.
#The burger shop skin
Often, the issue with it is that much of the blemishes are seen due to the fact that they have different color from the skin around it. It is a great technique to work with and it produces pretty astonishing results. Why is it called frequency separation? I’m not sure yet, but I guess it refers to the detail frequency, because you do separate the fine detail (a.k.a texture) from the coarse detail (a.k.a tone), right? The name doesn’t really matter, after all. In general, frequency separation is a portrait retouching technique which focuses on retaining as much texture as possible. I have also mentioned it on several occasions in my posts here, and after receiving several requests to make a tutorial on it, I decided to devote a post specifically to the topic. If you have seen some of the portrait retouching videos on the internet, you have probably stumbled upon the term “frequency separation” at one time or another.
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