I need help with BlendSrf

I have the file attached. It’s coming so close, but I need to make the two surfaces flow into each other and seem like one piece. I will then join everything to make it a closedpolysrf.


HelpFile.3dm (5.1 MB)

You can see part of the cause for the problem on your screenshot. In some places, the swept ring has sudden change in curvature. This has to do with your rails being simple rectangles with rounded corners. I rebuilt two cross sections of the ring as degree 3 curves with 34 points and changed the curve seam to be at the underside of the ring. This way, you get a ring which consists of a single surface.

I trimmed the ring with an isocurve. The blend still wasn’t looking nice and I figured out the blend would benefit from a slightly different trim curve on the cylindric cap. I took the section of the ring which is inside the cap, oriented it roughly perpendicular to where the ring goes through the cap and scaled it a few times…

HelpFile.3dm (6.0 MB)

Do you happen to have a threaded inside surface for this bottle cap?

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Mind posting an iges or Rhino5 file?

Thank you for your help! Yes there is more to the model as shown in this image, I just didn’t include the rest of the cap in the file

Here… Thank you!

Rhino_5_helpFIle.3dm (5.0 MB)

If my contribution is a solution to your problem then please hit the solution button. Thank you

https://youtu.be/pcMIvkpxk0E - Techniques you really need to understand to blend areas like this.
Assuming the creases in the handle section are intentional you will need to be intentional about how they blend. Start blocking in your larger blends based on your creases. As noted before split with iso-curve wherever possible. Dont use the blendsrf, instead use blendcrv, create a 4 sided surface and run Matchsrf to keep the point count and highlight control clean.
That said Im not satisfied with these highlights yet- but the general approach should be something similar. Xnurbs addon would also be a good solution for areas like this. There are some very stretched out blend surfaces that make this area tricky.

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I took a similar approach. The surfaces get bigger towards the end. The edges of the handle were continued hard.
I did a couple of tries until I decided on a form of opening.
I’m not happy with the bottom. The bulges on the left and right of the middle surface are special.

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