Thank you Michael and PILOU,

@Michael
you are right, I didn't see the other option for a bended shape. But what I need is the second option. So now I know there is no way to do it with a single command.

I modeled the whole shape with a few extrusions and offsets, at the end a boolean union. Done in a minute.

Again thanks for the Hints

Michael crossing! :)
Or like this ?



Copy Curve
Trim
Keep some Parts and increase size of straigth segments
Extrude
Trim
Shell

Hi dune1982, you're welcome! It is actually possible to do this with one single command, having the curves configured like this, with these 2 lines as the profile curves and the other curves joined up as rails:



With that configuration it's also possible to use Network or also Loft between the top and bottom ones to do it in one command.

However, all of these "do it in one command" options will generate a lower quality result because it's not good to have a surface corner that has tangent edges in it as you will get here, the natural definition of the surface normal at such areas becomes poorly defined. It's better for a rounded corner of a surface to be done by having a square cornered surface that has trim curves on it instead of that.

Usually when there's almost any kind of irregularity to a boundary (like edges tangent, having a complex edge with zig-zags or whatever), it's usually best to have an extended simple base surface that is then trimmed to the boundary rather than trying to generate the initial surface directly to that boundary.


@Pilou - yes that's another possibility, it's just more convenient to use a method that uses fewer curves to do the job.

- Michael