Hi Mala,

re:
> After filetting the curves should be together. Similar like at the unfilleted textile.
> Do you have an idea how the filleted version may kept together?

So if I'm understanding correctly, you want the fillet surfaces on the filleted result to graze each other in tangent intersection?

Unfortunately, no fillet won't generate such a result. The fillet calculation in mechanical CAD programs is just not set up to calculate such a result, the constraint of having 2 fillet surfaces from different areas touch each other is just not part of the filleting process at all.

That's a pretty unusual constraint, I'm not sure how to construct that.

Is the primary constraint that you already have the curve where the "fillets" are supposed to touch and you need to build smooth surfaces off of that?

Or should the spot where pieces touch be generated by intersections between some other surfaces?

Sorry much of that is not really clear to me, do you have any images showing what the result is supposed to look like?

- Michael