3. In Photoshop, you need to carefully clean the entire background with a hard eraser, you can not use a magic wand. After that, select a transparent background with a magic wand and use Photoshop tools to cover the outer edge of the photo with a thin contour 3 pixels wide, the contour color is flesh color. This outline will hide the unnecessary translucent pixels that give a white stripe in YafaRay. With this outline, everything will be without a white edge when rendering.

Thank you for this clear explanation on how to get the best result using photos. But it raises some questions for me.

I assume that the thin contour is around the straight sides of the photo. As I understand it, it is just so that the outline is not transparent because that causes the white line with YafaRay. Right?

Why 3 pixels wide for the contour line? Shouldn't 1 pixel be enough to avoid a transparent outline?

Is there any particular reason for the flesh color? Or could any color resembling the background do the same?

How do you keep the outline from being visible in the end result? Just by color?