This has happened to me many times:
I have an open quilt and want to round a corner on it. The corner is where 2 surfaces meet. These surfaces have boundaries that lie on a plane. Where the round comes down to this plane, instead of lying on the plane, it kind of lifts up and away from the plane. Usually I have to mirror the quilt and merge the 2 quilts (to create a closed quilt, then a solid), because the thing is symmetrical. But of course, when I merge the two halves they don't close because of that round edge not lying on the plane.
Does anyone know a way of making it behave? I understand the geometrical reason why it does that... the trouble is I can't imagine a scenario where an engineer wants the edge of his radiused corner to lift away in a graceful spline tangential to the adjecent edges. Flat part lines are cheaper.
And no, I don't want to make it a closed quilt with a flat surface on the plane, for reasons I can't be bothered explaining as it's going-home time
What you are seeing is as expected.
When you start working with draft angles, 3D turns into 12D
Yeah, I've done all of these, especially the extend ones. That of course addes 2 features every time I do it. Sweeping a surface doesn't usually give the same result as a round, and also doesn't always work.
I thought there may have been some setting I could have used. I don't know, for example, what "extend surfaces" means. I have tried that before but it makes no visible difference to the round.
Looks like another Product Idea coming up, as I can only see this as a flaw in the software. Like I said, I can't imagine why an engineer would not want the end of the round to lie on the same plane as the adjacent edges.