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