Yes, I’m trying to figure out how to make region, next to the red edges, smooth like on the profiles 1 & 2. In my imagination sections between profiles 1 & 2 should be similar to profiles generated by “tween” function
You are right, tangency is correct -> there is one issue still existing (my headache now) -> it changes rapidly just before red edge line. Profiles 1 & 2 are “smooth” (actualy profile 1 is half circle, so it has constant tangency).
On the isocurves I mark it in red circle (previous post).
I did offset not by -0.5 but -5 and it becomes like in the picture below.
It is even more clear at the end of shape…
What could be a right a way to build a primary surface in a such a way, that after offesting it by -5, the new one would be without red circled “bumps or deflections”?