# Trying to union 2 bodies but need to remove the intersecting portions

**URL:** <https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568>\
**Category:** Modeling Questions\
**Created:** [November 4, 2026, 6:56pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568 "2026-11-04T18:56:20Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![tech1](https://avatars.discourse-cdn.com/v4/letter/t/4bbf92/32.png) [@tech1](https://discourse.shapr3d.com/u/tech1)\
**Post date:** [November 4, 2026, 6:56pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568/1 "2026-11-04T18:56:20Z")

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Hi,

I am having trouble coming up with a way to union 2 bodies but remove only the intersecting items. I think I have the modeling incorrectly but can’t find an easy way around it.

The 2nd object was created using a loft and I am trying to union that object onto the 1st object, and remove the intersecting faces. I have attached the shapr export and the pic below (blue outline) is what I am trying to remove. The final object needs to be a union of the 2 bodies without the blue outlined face.

I’ve been trying things but keep getting partial results. I am definitely missing something.

[naca\_duct\_intersection.shapr](https://discourse.shapr3d.com/uploads/short-url/6bVR7ID2IW34fGPzT4D2s9ImK0S.shapr) (274.2 KB)

 ![naca_duct_intersection_remove](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/8/9/8949af04453d7829eb44a43eab175f55627bf009.png)

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**Author:** ![Fawksey3D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/fawksey3d/32/36063_2.png) [@Fawksey3D](https://discourse.shapr3d.com/u/Fawksey3D)\
**Post date:** [November 4, 2026, 7:07pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568/2 "2026-11-04T19:07:13Z")

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If I understand correctly. A few ways to deal with this. But with odd shapes - I typical project onto a plane that is parallel to the shape needed to be cut. Use the resulting sketch to hollow out.

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**Author:** ![tech1](https://avatars.discourse-cdn.com/v4/letter/t/4bbf92/32.png) [@tech1](https://discourse.shapr3d.com/u/tech1)\
**Post date:** [November 4, 2026, 7:20pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568/3 "2026-11-04T19:20:31Z")

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Ah, very interesting..I’ll give that a whirl. Looks promising

Thanks.

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<div class="post-metadata">

**Author:** ![tech1](https://avatars.discourse-cdn.com/v4/letter/t/4bbf92/32.png) [@tech1](https://discourse.shapr3d.com/u/tech1)\
**Post date:** [November 4, 2026, 7:24pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568/5 "2026-11-04T19:24:03Z")

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That worked great! I did a subtract and save the bodies then projected to get the following.

 ![projection1](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/4/d/4dd884698cb630cc552fbda7500544bab9088583.png)

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**Author:** ![DrKronos](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/drkronos/32/36064_2.png) [@DrKronos](https://discourse.shapr3d.com/u/DrKronos)\
**Post date:** [November 4, 2026, 7:24pm UTC](https://discourse.shapr3d.com/t/trying-to-union-2-bodies-but-need-to-remove-the-intersecting-portions/42568/6 "2026-11-04T19:24:53Z")

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Yeah, that looks better. 😅