I find that some textures have seams showing before they are rendered, but for some reason they do not show after a final render is done. Is that what you are referring to, or are you talking about seams after rendering?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi