For texture creation, you can use a 3D app that alows you to paint directly over the 3D object file like Blender does.
Then save out the texture maps from Blender without having to worry about the seams between textures.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!