Answer
Of course you can add textures by merging images. There probably are tutorials, but it’s not really difficult to imagine how it could be done.
A fairly simple method:
- Find or take a photo of real lips
- Create a texture by using the high pass filter
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Erase everything except the lips
-
Scale and position the texture over the lips
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Set the layer blending mode to Overlay
Note: If the lips don’t quite match/align, you could use the liquify filter to distort them to fit.
Here’s an example showing steps 4 to 5. The result is quite subtle, which is probably key to not making it look too fake.
Attribution
Source : Link , Question Author : Ben Smithy , Answer Author : Billy Kerr