It's something that takes lots of practice. Since you can't paint ON the model (PS7), you should use what's called a seam guide which shows where the texture on one part meets up with the texture on another part so that you can match them. Depending on what figure it's for there "might" be a seam guide available. SnowSultan made some for all the Daz Generation 3 figures at least, but since I don't do skins, I sort of lost track if anyone else took up the cause for the more recent figures ;). Someone will come along with the pertinent info I'm sure.

edit: SnowSultan's been busy. Maybe you'll find what ya need here?

IF what you mean is that when you render you get a white seam around your texture edges, that's different and means you need to go over the edges of the template a little farther. I usually go at least 5px over the edges of templates with color just to be sure I don't get the white edges. When inside Poser, set the texture to Crisp if you have Poser 9 or 10.

Laurie