# Sweep with different radius start/end
**URL:** https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445
**Category:** Modeling Questions
**Created:** [February 15, 2022, 8:27pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445 "2022-02-15T20:27:52Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@davorin](https://discourse.shapr3d.com/u/davorin)
#### Post date: [February 15, 2022, 8:27pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/1 "2022-02-15T20:27:52Z")
Good evening đ
Will there be a function in the future to define start and end shape with the sweep function?
What I want to achieve is a curved tube with different start end end radius:
Or is there another way to achieve this?
thanks in advance
richard
PS: Would be nice to be able to create nautilus like circular bodies (o;
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### Author:  [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [February 15, 2022, 8:37pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/2 "2022-02-15T20:37:43Z")
Try Guided Loft.
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### Author:  [@davorin](https://discourse.shapr3d.com/u/davorin)
#### Post date: [February 15, 2022, 9:03pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/3 "2022-02-15T21:03:28Z")
Well that doesnât give a result I expectâŚorâŚway difficult to create the correct guide lineâŚI assume it only allows oneâŚ
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### Author:  [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [February 15, 2022, 9:24pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/4 "2022-02-15T21:24:48Z")
Hereâs a workaround using Sweep.
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### Author:  [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [February 15, 2022, 9:32pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/5 "2022-02-15T21:32:59Z")
I took my previous example, moved it to one side and made a new body using Guided Loft. They are slightly different but for the most part quite similar.
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### Author:  [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [February 15, 2022, 9:59pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/6 "2022-02-15T21:59:48Z")
Okay, one last example. I moved the previous lofted body and made a new one.
This shows that the start circle, if changed to a different angle will affect the overall loft.
[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/9/9d9307856166552837c97c2d2758450a41b8629a.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/9/9d9307856166552837c97c2d2758450a41b8629a.mov)
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### Author:  [@davorin](https://discourse.shapr3d.com/u/davorin)
#### Post date: [February 18, 2022, 2:20pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/7 "2022-02-18T14:20:28Z")
Seems the scale at the end is the best approach Shapr3D can offerâŚonly works nicely on a single segment pathâŚas soon there are more the scaling has only effect on the last segment:
Still wonder why the loft tool wonât take a path in the middle as guideâŚis that a restriction others like Fusion 360 face as well?
But then againâŚnothing beats OpenSCAD in this đ
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### Author:  [@PEC](https://discourse.shapr3d.com/u/PEC)
#### Post date: [February 21, 2022, 9:28pm UTC](https://discourse.shapr3d.com/t/sweep-with-different-radius-start-end/17445/8 "2022-02-21T21:28:01Z")
Hi Richard,
Actually, you can loft with as many guides as you need, which is a very powerful addition to the original loft function.
So, guided loft if really worth the try, as Mike proposed: it probably does what you were expected.
It doesnât do middle path guide though so you have to sketch inner and outer guides.
I did them using the âif it looks right, it should be rightâ rule đ
With 2 faces and 2 guides, you already get a pretty decent result.
If you want a better cross section all around the part, you have two choices:
- add a third cross section, or
- add a third guide.
I upload the .shapr file if you want to try by yourself.
[Loft with different radius start end.shapr](https://discourse.shapr3d.com/uploads/short-url/qT66Y9UMg36kfSy3kTeah3L03Us.shapr) (582.6 KB)
ps: OpenSCAD is cool and a very powerful complement to Shapr3D; I use it to create parametric gearsâ teeth in dxf file and import them into Shapr3D to build the full part.
Your pipe modeling is great. I wonder how you did it. Did you created various spheres with variable radius around half a circle and hill them all?
What is certain is you can do something very similar with Shapr3D, lofting just 3 faces with 2 or 3 guides.
