# Lofting a rectangle to a circle along a curve of 90 deg

**URL:** <https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168>\
**Category:** Modeling Questions\
**Created:** [May 29, 2025, 7:09am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168 "2025-05-29T07:09:41Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Rtfm00](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/rtfm00/32/21887_2.png) [@Rtfm00](https://discourse.shapr3d.com/u/Rtfm00)\
**Post date:** [May 29, 2025, 7:09am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/1 "2025-05-29T07:09:41Z")

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![Lofting challenge](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/1/2161d95d20404b2ff5d0a2e949c5cbb4b5d9feb3.png)  
This should be simple, but I can’t figure it out…

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 29, 2025, 8:34am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/2 "2025-05-29T08:34:23Z")

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Like so?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/9/b97030f02a02411b7caa370ba4475c8984bf556f.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 29, 2025, 8:36am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/3 "2025-05-29T08:36:58Z")

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We’ve already been through all of this in the topic about cooling for the 3D printer.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/e/bea4fe2836b6278fd480c5e68d5892ec1f016ae5.jpeg)

Or that wasn’t you? 🙂

> [@Lofting between two faces](https://discourse.shapr3d.com/t/lofting-between-two-faces/30888):
>
> I’m trying to create a loft from the tip of my cooling duct to an inlet above it. I’d like the loft to follow a smooth curve. I’ve watched every LOFT tutorial I can find, and they all seem to show how to loft between planes (circles, rectangles etc). But I want to loft from my duct exit to its entrance. And I can’t for the life of me figure out how to do it. Here’s my current cooling duct. Currently the duct travels vertically, and then sweeps outwards in an arc. I want the arc to begin a…

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**Author:** ![Rtfm00](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/rtfm00/32/21887_2.png) [@Rtfm00](https://discourse.shapr3d.com/u/Rtfm00)\
**Post date:** [May 29, 2025, 8:49am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/4 "2025-05-29T08:49:48Z")

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Hi Alex. Unfortunately, it WAS me - but I didn’t realise it was basically the same thing. My apologies. I’ll go back to the cooling duct and figure it out…  
Thanks mate,  
Duncan

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 29, 2025, 8:59am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/5 "2025-05-29T08:59:21Z")

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> [@Rtfm00](#):
>
> I didn’t realise it was basically the same thing

A loft is always a loft. To create the desired shape, you need to define profiles along the path — that’s the basic principle.

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**Author:** ![Rtfm00](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/rtfm00/32/21887_2.png) [@Rtfm00](https://discourse.shapr3d.com/u/Rtfm00)\
**Post date:** [May 29, 2025, 9:11am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/6 "2025-05-29T09:11:31Z")

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Thanks mate. I don’t know how you guys get this - I really struggle with CAD. But I’ll persevere.

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [May 29, 2025, 9:13am UTC](https://discourse.shapr3d.com/t/lofting-a-rectangle-to-a-circle-along-a-curve-of-90-deg/38168/7 "2025-05-29T09:13:32Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/b/bba275f9f62f91344259ccd4a437a25573cdfb2c.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/7/771ae1a19af36d6c7262e721298efd55d3816f82.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/9/795320115cae87fcb6640d3c4e41d8b2e053710b.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/4/049bcaf4f4f5543df096ee83208d70182908b341.png)