Retouch Skin with Frequency Separation – Classic Day 24

Retouch Skin with Frequency Separation

Frequency separation splits a photo into two layers: one that holds the texture (pores, hair, fine detail) and one that holds the color and tone. Once they are apart you can smooth uneven color without softening a single pore, or fix texture without touching the color. It is one of the most powerful retouching techniques in Photoshop, and the included action sets it up in a few clicks.

This lesson picks up where yesterday’s blemish removal left off, using the same portrait.

Run the Frequency Separation Action

1. Load the Action

   Go to Window > Actions, open the panel menu and choose Load Actions. Select the PHLEARN Frequency Separation action from the download and click Open. It appears at the bottom of the list.

2. Check Your Bit Depth

   Go to Image > Mode. JPEGs are 8-bit and raw files are usually 16-bit. Pick the matching version of the action.

3. Play It and Set the Blur

   Press Play. When the Gaussian Blur dialog appears, raise the radius until no skin texture is visible, around 30 pixels on a full-size portrait, and click OK. Click Continue through the remaining steps. You now have a group with a High Frequency (texture) layer on top and a Low Frequency (color) layer beneath it.

What Just Happened

Move the High Frequency layer and only the texture moves; move the Low Frequency layer and only the color moves. Turn the texture layer off and you see a blurred photo; turn it back on and every pore returns. That separation is what makes the next steps possible.

Smooth Color and Tone

4. Create a Layer Between the Two

   Click the Low Frequency layer and add a new empty layer, so it sits above the color and below the texture. Anything you paint here changes the color while the texture stays visible on top.

5. Set a Soft Brush at 5% Flow

   Press B, set Hardness to 0%, and set Flow to 2-5% (hold Shift and type 05). Low flow is essential. A high flow lays down solid color and looks painted; low flow feathers one tone into the next over several passes.

6. Sample and Paint in Small Circles

   Hold Alt/Option and click to sample skin right next to a patchy area, then paint over the transition in small circles with a brush about the size of the patch. Resample often. Work the transitions between light and dark: the forehead, under the eyes, across the cheeks.

7. Stay Zoomed Out

   This step is about how light and color blend across the face, not individual details, so work at a zoom level where you can see the whole face. If it looks like nothing is happening, it is working correctly; toggle the layer to check.

8. Undo Mistakes with the Eraser

   If an area goes too smooth (an eyebrow, for example), press E and erase that part of the painting layer, then try again.

Fix Texture on the High Frequency Layer

9. Select the High Frequency Layer

   Click the texture layer and zoom in. This is where flyaway hairs, stray stubble and rough patches live.

10. Clone Stamp with Sample: Current Layer

    Press S for the Clone Stamp and set Sample to Current Layer. (Current & Below will pull in color and look terrible.) Alt/Option-click on clean texture and paint over the flyaway. Only the texture changes; the color underneath is untouched.

Judge the Result

11. Toggle the Group Zoomed Out and Zoomed In

    Frequency separation shows its value at both distances. Zoomed out, the light-dark-light banding on the forehead becomes an even gradient. Zoomed in, every pore is still there.

Keep It Natural

The goal is skin that looks like the person on a good day, not plastic. Smooth the transitions, keep the texture, and stop before it looks retouched. PHLEARN’s full frequency separation PRO course goes much deeper with more examples and workflows.

Related Tutorials

• New Blemish Removal Tool in Photoshop | Free Tutorial
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• Color Gradients in Photoshop: 4 Easy Steps, Safe Skin