Hi Mike, see the attached example for a fixed up curve - here I've used Rebuild with "# of points" mode and turned off "Keep corners" so that it ignores the sharp corner areas and builds one single smooth segment through the whole thing.

By the way, the whole general area of building things surface by surface and doing surface blending is kind of in a more advanced and finicky area of NURBS modeling - really the main area where NURBS are strongest and also most convenient is when you are using the solid modeling part of the toolset instead of the low level surfacing tools. But of course for some kinds of flowing/wavy structures the surfacing toolset is needed.

But you should generally expect a higher learning curve for that style of modeling, and really if you're doing that kind of flowing surface stuff it gets into a gray area where you may be better off doing sub-d modeling for such shapes instead actually.

So anyway, just be aware that you're into the "more finicky" side of NURBS modeling with this general area, solids modeling where you're building things more by booleans and fillets tends to be where NURBS modeling has its best strengths.

- Michael

Hi Mike,

> Did'nt thought, that the blend is so limited and hard to get.

It's something that I want to improve in the future, especially to allow more than one edge on each side of the blend.

But it hasn't been a big priority yet because as I described above, it's basically in a category of more advanced and more difficult type of NURBS modeling.

The initial focus for MoI has been much more on the area where NURBS modeling is actually really strong in, like especially boolean construction and using 2D curves to construct large parts of your model.

- Michael

Hi Michael,

its from here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4561.1

So he built that profile with separate curves, jointed the parts
and rebuilded it.
But as I see now, when I look close, that ist overall smooth.

But what should I do, if I have a model with an open end
and I want to f.e. close that opening when it is not planar?
How should I rebuild the edges of that opening?

MIke

Hi Mike,

> But what should I do, if I have a model with an open end
> and I want to f.e. close that opening when it is not planar?
> How should I rebuild the edges of that opening?

Usually the easiest method is to initially build it with a planar end, and then use a boolean to slice the end off with a 2D curve to make the final non-planar ending shape.

That general strategy of building something that is initially extended further than your final shape and then cutting it off tends to be a good method to use for a lot of situations.

So that would looks something like this:











So note there that you don't initially worry about the final non-planar end shape at first - just get a simple shape constructed first and then put in some details by slicing that shape up.

That's a lot easier approach than if you tried to for example model the non-planar shape all at the beginning and then have to worry about how to fill it in.

With a good NURBS solid modeling workflow some of the edges in your final shape should not be drawn directly by you but instead should be the result of some kinds of boolean operations. It's not good to try and just draw every single edge including 3D warped edges right from the start and then try to patch them in - that's frequently what people with a poly modeling background seem to end up doing though so kind of watch out for that.

- Michael