# Can’t extrude a non planar face

**URL:** <https://discourse.shapr3d.com/t/can-t-extrude-a-non-planar-face/39956>\
**Category:** Modeling Questions\
**Created:** [December 11, 2025, 11:13am UTC](https://discourse.shapr3d.com/t/can-t-extrude-a-non-planar-face/39956 "2025-12-11T11:13:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jrhjrh](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jrhjrh](https://discourse.shapr3d.com/u/jrhjrh)\
**Post date:** [December 11, 2025, 11:13am UTC](https://discourse.shapr3d.com/t/can-t-extrude-a-non-planar-face/39956/1 "2025-12-11T11:13:20Z")

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I’m trying to understand the rationale for this limitation:

If I project a rectangle sketch onto a curved body I can perform an offset face operation, ie I can modify the existing body. But I can’t perform an extrude operation to create a fresh body. (Can’t extrude a non planar face). Why not?

thanks.

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**Author:** ![jean-philippe2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jean-philippe2/32/27353_2.png) [@jean-philippe2](https://discourse.shapr3d.com/u/jean-philippe2)\
**Post date:** [December 12, 2025, 8:45am UTC](https://discourse.shapr3d.com/t/can-t-extrude-a-non-planar-face/39956/2 "2025-12-12T08:45:39Z")

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Hi,  
You can’t Extrude but you can use Tool \> Offset Face

 ![Capture d’écran 2025-12-12 à 09.46.48](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/d/0d028d0982ef28c4e703a1c0fe85154d8cac3898.jpeg)

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<div class="post-metadata">

**Author:** ![jrhjrh](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jrhjrh](https://discourse.shapr3d.com/u/jrhjrh)\
**Post date:** [December 12, 2025, 9:08am UTC](https://discourse.shapr3d.com/t/can-t-extrude-a-non-planar-face/39956/3 "2025-12-12T09:08:18Z")

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Thanks. Yes, offset face is possible. What I’m curious about is why extrude is not possible.