Boolean modifier doesn't work as expected #73614

Closed
opened 2020-02-05 17:14:46 +01:00 by BlenderSpot · 10 comments

System Information
Operating system: Windows 10 64 bits

Blender Version
Broken in: 2.81 release, 2.82 beta, 2.83 alpha (to the date of posting this)

Short description of error
Whether it's the union, intersect or difference option is selected, the resulting mesh is not what expected out of the boolean modifier.

Exact steps for others to reproduce the error
Just turn the modifier on in the file provided:
boolean.blend

**System Information** Operating system: Windows 10 64 bits **Blender Version** Broken in: 2.81 release, 2.82 beta, 2.83 alpha (to the date of posting this) **Short description of error** Whether it's the union, intersect or difference option is selected, the resulting mesh is not what expected out of the boolean modifier. **Exact steps for others to reproduce the error** Just turn the modifier on in the file provided: [boolean.blend](https://archive.blender.org/developer/F8323633/boolean.blend)
Author

Added subscriber: @unimbox

Added subscriber: @unimbox

Added subscriber: @Dspazio

Added subscriber: @Dspazio

Hi, the boolean operators (those two cylinders on your example) are overlapping each other. With the actual boolean code you need to have mainfold geometry to work with. Not a bug, but I'm also reluctant to consider it a "known issue" or a limitiation.

Thanks.

Hi, the boolean operators (those two cylinders on your example) are overlapping each other. With the actual boolean code you need to have [mainfold geometry ](https://blender.stackexchange.com/questions/7910/what-is-non-manifold-geometry) to work with. Not a bug, but I'm also reluctant to consider it a "known issue" or a limitiation. Thanks.
Member

Added subscribers: @howardt, @JacquesLucke

Added subscribers: @howardt, @JacquesLucke
Member

I can see the issue, but I do not know if an overlapping mesh is supported.

I can see the issue, but I do not know if an overlapping mesh is supported.
Member

The "Circle" object in this file is not a watertight single volume. This is not supported by the current code.

The "Circle" object in this file is not a watertight single volume. This is not supported by the current code.
Author

Indeed, you all are right. When I have the mesh non-intersecting or made into a manifold geometry, the boolean behaves correctly.

Indeed, you all are right. When I have the mesh non-intersecting or made into a manifold geometry, the boolean behaves correctly.

Added subscriber: @StephenSwaney

Added subscriber: @StephenSwaney

Changed status from 'Needs Triage' to: 'Resolved'

Changed status from 'Needs Triage' to: 'Resolved'
Stephen Swaney self-assigned this 2020-02-06 00:47:43 +01:00

Closed as being a known issue or limitation. Thanks for reporting.

Closed as being a known issue or limitation. Thanks for reporting.
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Reference: blender/blender#73614
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