Retouching skin that retains the skin’s texture while it removes skin blotches & imperfections is easily done through Adobe Photoshop.
Open a photo of a face that you would like to retouch
The 1st step is to make 2 copies of the layer by pressing Ctrl + J twice. Here I will rename the top layer as Texture & the bottom layer as Blur. You can use your own naming.
Deselect the top layer while and make sure the Blur Layer is selected.
Then go to Filter > Blur > Gaussian Blur
Drag the slider until it blurs just enough it hides the pores and blotchiness. Then click ok
Now make the top layer visible & active
Go to Image > Apply Image
Select the Layer: Blur
Then click OK
Change the Blend Mode to Linear Light
At this point your photo will look exactly the same. Make the middle layer active
Now zoom into the area where you would like to retouch
Open the lasso tool and make a selection of the area
Will feather it so its edges will be soft. For me the best way to preview it is to click the Refine Edge button
Or go to Select > Refine Edge (Ctrl+Alt+R)
Drag the feather slider to the right until till the inside of the selection is blurred approx. equal to size in the photo below. The actual pixel amount on your maybe very different based on the selection area size and photo resolution. Remember your pixel amount & click Cancel
At the top in the Feather field, type in that amount
Deselect it by pressing Ctrl + D
To apply the feathering, apply another selection in the area and go to Filter > Blur > Gaussian Blur
Slide the blur radius to an amount that makes the blotchiness disappear. The texture remains because it’s on a different layer.
Click Ok & deselect it by pressing Ctrl + D. if you see some imperfections in the texture, we’ll take care of them in a few minutes. Right now we’re just concerned about removing the blotchiness & overall inconsistencies.
Draw another selection around the other parts like the cheek and make sure you don’t get too close to the eyes, hair, lips, & neck
Let’s retouch the neck of the subject
Bring the neck into view. Since the neck has problems mostly with skin blotchiness, we’ll keep the blur layer active & open the lasso tool.
I’ll select inside her neck & shoulder blades, avoid getting too close to her clothing, chin & hair. I’ll repeat my last filter which was Gaussian Blur & deselect it.
To see the before & after, Alt + Click on the eyeball icon next to the bottom layer, to hide all the other layers.
Check this out while you wait!