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New Exact Boolean Plane bug Blender 2.91 Beta #82642

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opened 2020-11-12 10:08:20 +01:00 by Arken · 6 comments
Arken commented 2020-11-12 10:08:20 +01:00
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System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Radeon RX 560 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.9.1 27.20.12029.1000

Blender Version
Broken: version: 2.91.0 Beta, branch: master, commit date: 2020-11-07 14:02, hash: 46da8e9eb9

Short description of error
When you boolean a bunch of cylinders on a plane. The new Exact boolean behaves unexpectedly, while the old Fast method behaves correctly.

FAST
Blender 2.91 New Exact Boolean Plane bug (Fast, correct).jpg

EXACT
Blender 2.91 New Exact Boolean Plane bug.jpg

Blender 2.91 New Exact Boolean Plane bug.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Radeon RX 560 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.9.1 27.20.12029.1000 **Blender Version** Broken: version: 2.91.0 Beta, branch: master, commit date: 2020-11-07 14:02, hash: `46da8e9eb9` **Short description of error** When you boolean a bunch of cylinders on a plane. The new Exact boolean behaves unexpectedly, while the old Fast method behaves correctly. **FAST** ![Blender 2.91 New Exact Boolean Plane bug (Fast, correct).jpg](https://archive.blender.org/developer/F9264054/Blender_2.91_New_Exact_Boolean_Plane_bug__Fast__correct_.jpg) **EXACT** ![Blender 2.91 New Exact Boolean Plane bug.jpg](https://archive.blender.org/developer/F9264056/Blender_2.91_New_Exact_Boolean_Plane_bug.jpg) [Blender 2.91 New Exact Boolean Plane bug.blend](https://archive.blender.org/developer/F9264059/Blender_2.91_New_Exact_Boolean_Plane_bug.blend)
Arken commented 2020-11-12 10:08:20 +01:00
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Added subscriber: @Arken

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Philip Holzmann commented 2020-11-12 18:51:41 +01:00
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Added subscriber: @Foaly

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Philip Holzmann commented 2020-11-12 18:51:41 +01:00
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Changed status from 'Needs Triage' to: 'Archived'

Changed status from 'Needs Triage' to: 'Archived'
Philip Holzmann self-assigned this 2020-11-12 18:51:41 +01:00
Philip Holzmann commented 2020-11-12 18:51:41 +01:00
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This is not considered a bug.

The new Exact mode works only with manifold meshes, and your plane is not manifold.
You can solidify it before the boolean to make it work.
See the manual for reference: https://docs.blender.org/manual/en/dev/modeling/modifiers/generate/booleans.html

This is not considered a bug. The new *Exact* mode works only with manifold meshes, and your plane is not manifold. You can solidify it before the boolean to make it work. See the manual for reference: https://docs.blender.org/manual/en/dev/modeling/modifiers/generate/booleans.html
Howard Trickey commented 2021-02-07 17:39:46 +01:00
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Howard Trickey commented 2021-02-07 17:39:46 +01:00
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While still no guarantees, the commit just mentioned makes this case work in exact boolean. Unfortunately, it is very slow. Much better results would happen if both operands were closed volumes.

While still no guarantees, the commit just mentioned makes this case work in exact boolean. Unfortunately, it is very slow. Much better results would happen if both operands were closed volumes.
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Reference: blender/blender#82642
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