# Subtract glitch?

**URL:** <https://discourse.shapr3d.com/t/subtract-glitch/19831>\
**Category:** Modeling Questions\
**Created:** [June 12, 2022, 4:54pm UTC](https://discourse.shapr3d.com/t/subtract-glitch/19831 "2022-06-12T16:54:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![moto4p](https://avatars.discourse-cdn.com/v4/letter/m/82dd89/32.png) [@moto4p](https://discourse.shapr3d.com/u/moto4p)\
**Post date:** [June 12, 2022, 4:54pm UTC](https://discourse.shapr3d.com/t/subtract-glitch/19831/1 "2022-06-12T16:54:37Z")

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I am trying to subtract a negative shape from the base part and the result is wrong.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/c50ae41ec2cd5721766c6720264db5882847103b.mp4](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/c50ae41ec2cd5721766c6720264db5882847103b.mp4)

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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:** [June 12, 2022, 6:29pm UTC](https://discourse.shapr3d.com/t/subtract-glitch/19831/2 "2022-06-12T18:29:37Z")

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In your example, you are subtracting the turquoise blue base FROM the purple half cylinder body, right?  
If so, can you show us what the purple body looks like and hide the base?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/5/5b809d4294b47156b8871ea8052840f3598d36f7.jpeg)

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<div class="post-metadata">

**Author:** ![moto4p](https://avatars.discourse-cdn.com/v4/letter/m/82dd89/32.png) [@moto4p](https://discourse.shapr3d.com/u/moto4p)\
**Post date:** [June 13, 2022, 2:59am UTC](https://discourse.shapr3d.com/t/subtract-glitch/19831/3 "2022-06-13T02:59:09Z")

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sorry I have already recreated the project, the purple body is supposed to be a straight stick