A lot of it comes down to drawing in the missing details that are obvious to the brain but not visible to the eye.
Replies 3

Agreed.
A lot of the so-called "X-rays" people post are little more than standard levels adjustment of the breast area, using the burn function (or similar) to add nipples/areola, and adjusting/faking the color.
You can't reveal anything not already present in the photo. At best, you can show/enhance the indentations in clothing that aren't readily apparent. Anything more than that is just cleverly faking what we believe to be underneath IMO.

right on thanks guys... well i wish i knew how to do that shit lol.. do you guys know how to xray/fake good then ?