Hi,
Today I received another surprise. I wanted to connect two surfaces. I used Ruled and Loft Surfaces with same result. Unfortunately, gaps formed between the surfaces. This eliminates the possibility of stitching or joing model.

Why is everything so hard?

Thank you Tim. Looks good. But if I could understand what you mean. :)

As for the above, I did not understand how to do it.

Next, I want to ask how to close this hole? It is a common task for every CAD software. How is it done with Shark?

If I were a genius, I would have guessed it myself. ;)

Tim, did you notice that the hole is not round? I already noticed it for a long time. I quite often create similar models. Often after shelling remains O-shaped or oval opening.

Edited by user Saturday, April 28, 2018 2:39:39 PM(UTC)  | Reason: Not specified

>>I want to ask how to close this hole?

When possible, I let intersections fall out from smoother underlying surfaces. When necessary, I over extend the surface to get an intesection. This might invalidate your design intent so apologies in advance. Using that method, I did the following.

--untrim the large red surface to get a smooth under surface
--split back to the centerline
--update the profile curves to fall on the guide curves
--create new cover with guide
--linear extend the profile curves to create a cover that intersects the red surface (resolve links)
--split red with blue, and blue with red, get rid of extras

Those steps get you the image on the left.

I deleted the blue surface and then created a loft to get the image on the right. The image on the right has G1 continuity with the red surface if that is needed.

Tim

Edited by user Saturday, April 28, 2018 8:57:24 PM(UTC)  | Reason: Not specified

Thank you Tim. Yes, I used the same technique too. With round smooth shapes this works well. But how to do it in the case with drop-shaped hole? I can not imagine it.

After a huge number of trials and errors, I decided to complete this model in any case.

So. Working with surfaces is not very intuitive, complex and unpredictable. If I have successfully completed one step, this does not mean that I succeed the next step.

And I decided to use the simplest methods.
I created a base bottle with drop-shaped "grooves". Then I worked fast only with a solid body. But even Boolean operations were not always successful.

To use all the curves and avoid the dink or fold mentioned, you will need to create another curved along the yellow dash line you drew. That's the only way I can think you can control that fold.

From the looks of your recent pics, it seems you got the hang of the approach I took.

You asked about using different values for the blends, that's possible. There's a feature called variable blend at positions. It should work.

Regarding the seamless area you want, I don't think that's possible because the design won't allow it. You would have to approach that area just like the tear drop peak and leave a bridge. I think that's what you mean.