Hello Karsten,

Thank you for your reply, and also for your effort in illustrating the curvature analysis.

> Could you explain were the problem is with the seams?

Surfaces seams aren't basically a problem in themselves or in general,
but in some situations i explicitly want to build surfaces with the minimum complexity, in order to get less complex results.

The attached files illustrate an example of what i'm saying.

I hope that this example can better clarify what are my intentions.

Nice evening,

Marco.