The samples you provided all have quite a bit of noise in them due to excessive jpeg compression. This is your second attachment zoomed-in at 300%. All those rectangular shapes are due to jpeg compression, not the actual skin texture. Sometimes, if you're trying to match an edited area of skin to an existing image, you may deliberately want to introduce this jpeg noise. If that's what you're looking for, there are ways to do that.
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Assuming you do not want to do that, here are a few techniques to simulate skin texture. You can use any of these individually, or together in combination. The samples you provided all look like aged, worn skin, not the young, perfect skin in fashion magazines.
- I took your first image and used the clone stamp to get rid of the metallic piece of jewelry (or whatever that is).
- Then I gave it a healthy blur to remove all existing texture but to keep the underlying colors and gradations.
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- Above this layer, create a new layer and fill it with 50% Gray (Edit>Fill>50% Gray).
- Change the blend mode to Overlay.
- Go to Filter>Noise>Add Noise. Click the boxes for "Monochromatic" and "Gaussian".
- The amount of noise to add depends on the size and resolution of your image, but try 5% for now.
- Give this layer a Gaussian blur of something like 0.5 pixels to 1 pixel.
- You now have this:
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- Often, when you look closely at skin, you'll see reds, blues and other colors. You can simulate that effect.
- Create another new layer above your "Noise" layer. Fill it with 50% Gray and change the blend mode to Overlay.
- Go to Filter>Texturizer>Grain. Choose clumped grain.
- Give this layer a Gaussian Blur of about 1%.
- Reduce the layer opacity until the effect becomes very subtle. You don't want it to be too obvious.
- Something like this:
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- The skin in your sample seems to have a lot of blemishes and small bumps. Here's a way to make that.
- Create a new blank layer. Change the layer fill (not the opacity) to 0%.
- Go into the Layer Styles and select Bevel & Emboss. Use these settings, but adjust the light direction to match the lighting of your image.
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- Go into the brush tool and choose a brush that looks like this. Make the brush fairly large so that it draws shapes rather than tiny dots.
- Go into the brush dynamics and activate scattering.
- Draw across your skin image with this brush to introduce random bumps. (It doesn't matter what color you use because the Fill is set to zero.)
- Reduce the layer opacity to about 50%.
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- Lastly, you can add moles and other blemishes. I made a custom brush for this, but you can do it manually.
- On a new layer, select an average skin color and change the layer blend mode to Multiply.
- Draw random blemishes of different sizes and shapes.
- Reduce the layer opacity until you can see them, but not obviously. Make it subtle.
- Something like this.
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- You can also use the technique explained in the video that [USER=69670]@IamSam[/USER] attached, where he uses the Bloat and Pucker feature of the Liquify filter to simulate the texture conforming to the curve of the skin. I had not seen that idea before, but it's a good one and I will start using that, myself.
Good luck.
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