Hi pafurijaz, usually the best way to create surfaces without seams is to make areas that should be smooth to be made out of one larger extended surface instead of filling things in "patch by patch".

The "patch by patch" method is a much more difficult approach and tends to be very finicky even with fancy surfacing tools.

- Michael

Thanks , for advice, i will consider in the my workflow, in fact i use often patches to create surfaces,
Greetings