real, no scar, and the breast tissue sits naturally over of the ribcage.
If it is a boob job with the implant under the muscle the shape of the breast might look natural but the implant itself will be fixed under the muscle. making it look odd when lying down, and moving around.
If the implant is over the muscle, the implant can move but then it will look like there is a big lump sticking out and it just looks bad.
The only type of breast enhancement that i have trouble spotting is when there has been a fat transplant into the tit. Then it will look natural and move naturally, and the scar is just a small dot.