# Sweep between two dissimilar shapes

**URL:** <https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047>\
**Category:** Modeling Questions\
**Created:** [November 24, 2023, 1:14am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047 "2023-11-24T01:14:56Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![RTFM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/rtfm/32/21385_2.png) [@RTFM](https://discourse.shapr3d.com/u/RTFM)\
**Post date:** [November 24, 2023, 1:14am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047/1 "2023-11-24T01:14:56Z")

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I’m wanting to sweep from the top surface to the highlighted bottom surface - missing the central part of course. Any ideas? From what I can gather, one needs two surfaces and a path for the sweep to follow. But I can’t craw the path even. Help.  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/1/5/15c9b41a414fb97871946c12211d19df18096dd9.jpeg)

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [November 24, 2023, 2:05am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047/2 "2023-11-24T02:05:08Z")

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You can’t **Sweep** between two dissimilar shapes. It’s one surface and a path.  
You can use **Loft** however. Also note that you cannot loft hollow surfaces, they need to be solid. After doing a loft, you can use **Shell**.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [November 24, 2023, 2:22am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047/3 "2023-11-24T02:22:07Z")

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Taking a wild guess here, I assume you’d like the newly lofted part to miss the center cylinder.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [November 24, 2023, 2:30am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047/4 "2023-11-24T02:30:17Z")

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And here’s a more geometric result. Kind of like ducting.

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**Author:** ![RTFM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/rtfm/32/21385_2.png) [@RTFM](https://discourse.shapr3d.com/u/RTFM)\
**Post date:** [November 24, 2023, 9:17am UTC](https://discourse.shapr3d.com/t/sweep-between-two-dissimilar-shapes/29047/5 "2023-11-24T09:17:41Z")

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Fantastic! So easy when one knows how. Now I’m off in searxch of a tutorial on how to get a horisontal pipe to intersect with this lot. I’ve seen it somewhere.