# Issue with circular pattern extrusions

**URL:** <https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207>\
**Category:** Modeling Questions\
**Created:** [January 24, 2025, 12:19pm UTC](https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207 "2025-01-24T12:19:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![JeridHill](https://avatars.discourse-cdn.com/v4/letter/j/e79b87/32.png) [@JeridHill](https://discourse.shapr3d.com/u/JeridHill)\
**Post date:** [January 24, 2025, 12:19pm UTC](https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207/1 "2025-01-24T12:19:40Z")

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![IMG_0375](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/8/3/83f00cc9bb3115143d89cca70247dafb2b1328b7.jpeg)  

  
I’m having an issue with performing circular extrusions. I start with a section view and make my through hole. I then select the hole and rotate and it makes the extruded holes without issue. I then make my second cutout, this time, I extrude up to knock it out of the dome. Then I try my pattern and it conflicts and won’t perform. I’m not sure if it’s the way I extruded the second cutout? Has anyone seen this? If so, is there a better way I should be creating the pattern?

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**Author:** ![JeridHill](https://avatars.discourse-cdn.com/v4/letter/j/e79b87/32.png) [@JeridHill](https://discourse.shapr3d.com/u/JeridHill)\
**Post date:** [January 24, 2025, 4:52pm UTC](https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207/2 "2025-01-24T16:52:55Z")

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On a side note, I can easily make a pattern of the knockout as a solid object, make the pattern, selected body 1 and subtract the circular pattern from it. I guess my real question is, why is it conflicting when attempting to do it the way I show in the video.

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**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [January 24, 2025, 5:15pm UTC](https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207/3 "2025-01-24T17:15:39Z")

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I believe the logic is you are staking booleans on booleans.

On your video booleans works on areas that doesn’t already have booleans.

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**Author:** ![arroniow](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/arroniow/32/30268_2.png) [@arroniow](https://discourse.shapr3d.com/u/arroniow)\
**Post date:** [January 25, 2025, 5:44pm UTC](https://discourse.shapr3d.com/t/issue-with-circular-pattern-extrusions/36207/4 "2025-01-25T17:44:33Z")

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Hi there  
Try doing it the other way around.  
Extrude the small CUT body that you want, as a new body.  
Rotate it as the pattern of 8 bodies.  
Then Boolean subtract all 8 from the main body.  
You are then pattern copying bodies not Boolean operations.

 ![Pattern_Subtract](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/c/c/ccd934a34d4a456ceae730269ddd55e7b6423171.jpeg)