Image imported from derpibooru
Original Description:

Okay, so I am discovering by doing this with different characters that the same techniques as far as photoshop retouches will not work the same for every character. When I try the method I used for Twi and Sunset it would not work for RD because the blue tone was just too faint. So I used a Hue filter and it popped so much better than I expected! Those gorgeous abs look great. I tried going back and doing the same for some of the other girls and like I said, same method will not work for different characters. For Sunset and Twi they come out looking like their magically possessed, demon forms… made a note for the future in case I WANT that effect. Did a retouch on the eyes and tried to fix the left hand. It mostly worked but close inspection reveals flaws.

Original: https://derpibooru.org/images/3277254?q=uploader_id%3A481972

edited with permission.