Frequency separation retouching
A cheatsheet by @rstacruz|Refreshed about 2 years ago.Refresh|View source on Github

Frequency separation retouching in Photoshop

Frequency separation retouching in Photoshop

Duplicate the layer twice. Perform these in each layer:

Lower layer

  • Apply Gaussian Blur

Upper layer

  • Set layer mask to Linear light
  • Image → Apply Image
    • Layer: (select the lower layer)
    • Blending mode: Subtract
    • Scale: 2
    • Offset: 128