These are the guidelines I wrote before for best results:
Guidelines for Good Donor Photos:
1) Facing straight-forward. You might think she is facing straight forward--but look at the body, the more of an angle, the more distorted the end result will be. It tries to compensate for breast angle, but doesn't do a great job.
2) Well-lit. Inconsistent lighting or crazy shadows make the final result have artifacts.
3) Single subject. The program acts up when it detects multiple bodies. I prefer not to spend time cropping people around just to get a good result--might as well shop it to begin with, then. While you can do two seperate runs, then stitch them together, it takes extra time and effort.
4) Generally square in dimensions. The 'viewfinder' box on this program is square, so these long, vertical photos don't fit well. It's usually better to zoom out on them and add some whitespace on the sides just to make it square to begin with.
5) No smushed titties. The software uses what it can detect to guess at breast angle. If the bathing suit top is forcing the tits to a weird angle, it will try to duplicate that angle in the final result. This comes across as unnatural when viewed as 'naked'.
6) Hair, jewelry or anything interfering over the breast area. I have to go back and delete out some of this stuff, because it ends up only partially in the final image.
7) Super close-ups don't work very well. It gets a better result when there is actually some of the body to work with, rather than just tits + head.
8) As close to naked as possible. Bikinis work well. Skin-tight tops and bottoms -may- work, but no guarantees. The more of a hint of form there is, the better.
9) Strong preference for girls you actually know. Bonus if you provide their name