Photoshop Tutorial: How to do Frequency Separation for Retouching a Portrait

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. 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. In general, frequency separation is a portrait retouching technique which focuses on retaining as much texture as possible. 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. It is a great technique to work with and it produces pretty astonishing results.