Many sc models use Photoshop or similar software to improve their photos.
Usually for the wrong purposes, (according to my subjective and personal opinion.)
What I see most of is "air brush" treatment to make skin smoother and hide wrinkels.
To look younger or more 'perfect' and flawless.
But usually that model would be sexier with her imperfections. Esp the more mature women. Lines and wrinkles give personality and force to the image.
And the airbrush makes the pic look so plastic like...
But Photoshop should be used to take away disturbing details, such as a washing label on a bra or panty, or some cable on the floor, etc etc.
See pics below: small details whiped out - a label and an el socket on the wall.