2 title: Frequency separation retouching
7 ### Frequency separation retouching in Photoshop
9 Duplicate the layer twice. Perform these in each layer:
14 - Apply **Gaussian Blur**
18 - Set layer mask to **Linear light**
19 - Image → **Apply Image**
20 - Layer: _(select the lower layer)_
21 - Blending mode: `Subtract`
27 - <https://phlearn.com/amazing-power-frequency-separation-retouching-photoshop>