Inconsistent Boolean Behavior (2.93 regression?) #86805

New Issue

Alaska · 2021-03-22T00:04:52+01:00

Alaska commented

2021-03-22 00:04:52 +01:00

System Information:
Operating system: Linux-5.10.0-4-amd64-x86_64-with-glibc2.31 64 Bits
Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56

Blender Version:
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-21 00:24, hash: b4e96550ce
Worked: 2.92 release from preliminary testing

Short description of error:
In my scene I have an object that makes use of various Boolean modifiers. Roughly 50% of the time the Boolean modifiers are re-calculated (by re-opening the file or changing the boolean modifier visibility), the modifiers will produce the wrong result. Here's images showing the issue:


Correct	Incorrect

Exact steps for others to reproduce the error:
I'm not exactly sure how to reproduce it, so I've included a .blend file that has an issue.
To reproduce the issue with the .blend file, either:

Reload the file over and over again and observe the different results.
Toggle the visibility of one of the boolean modifiers in the .blend file on and off over and over and observe the different results.

If you would like to investigate the objects used for the boolean modifiers, then exit local mode by pressing / on the keyboard.

#86805 - Boolean Inconsistency.blend

Here's a video demonstrating the issue:
2021-03-22 12-01-06.mp4

**System Information:** Operating system: Linux-5.10.0-4-amd64-x86_64-with-glibc2.31 64 Bits Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56 **Blender Version:** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-21 00:24, hash: `b4e96550ce` Worked: 2.92 release from preliminary testing **Short description of error:** In my scene I have an object that makes use of various Boolean modifiers. Roughly 50% of the time the Boolean modifiers are re-calculated (by re-opening the file or changing the boolean modifier visibility), the modifiers will produce the wrong result. Here's images showing the issue: |![Boolean correct.png](https://archive.blender.org/developer/F9903005/Boolean_correct.png)|![Boolean Incorrect.png](https://archive.blender.org/developer/F9903007/Boolean_Incorrect.png)| | -- | -- | | Correct| Incorrect| **Exact steps for others to reproduce the error:** I'm not exactly sure how to reproduce it, so I've included a .blend file that has an issue. To reproduce the issue with the .blend file, either: 1. Reload the file over and over again and observe the different results. 2. Toggle the visibility of one of the boolean modifiers in the .blend file on and off over and over and observe the different results. If you would like to investigate the objects used for the boolean modifiers, then exit local mode by pressing `/` on the keyboard. [#86805 - Boolean Inconsistency.blend](https://archive.blender.org/developer/F9903015/T86805_-_Boolean_Inconsistency.blend) Here's a video demonstrating the issue: [2021-03-22 12-01-06.mp4](https://archive.blender.org/developer/F9903013/2021-03-22_12-01-06.mp4)

Alaska commented

2021-03-22 00:04:52 +01:00

Added subscriber: @Alaska

Alaska changed title from ~~Inconsistent Boolean Behavior~~ to Inconsistent Boolean Behavior (2.93 regression?)

2021-03-22 00:14:09 +01:00

Falk David commented

2021-03-22 13:37:46 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-03-22 13:37:46 +01:00

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

Falk David commented

2021-03-22 13:37:46 +01:00

I can confirm this issue on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-22 11:23, hash: c4c195672d. The evaluated mesh seems to be randomly switching between the two results.

I can confirm this issue on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-22 11:23, hash: `c4c195672d`. The evaluated mesh seems to be randomly switching between the two results.

Vladimir commented

2021-03-23 05:54:27 +01:00

Added subscriber: @Wovchick

Henrik D. commented

2021-04-16 22:15:18 +02:00

Added subscribers: @howardt, @HDMaster84

Henrik D. commented

2021-04-16 22:15:18 +02:00

I have done some ablation tests and reduced the file down to two booleans. You can see the result switch not only when reevaluating the modifier, but also when moving some of the vertices of the tube in that file.
#86805 - Boolean Inconsistency.blend
@howardt Any idea what could cause this?

I have done some ablation tests and reduced the file down to two booleans. You can see the result switch not only when reevaluating the modifier, but also when moving some of the vertices of the tube in that file. [#86805 - Boolean Inconsistency.blend](https://archive.blender.org/developer/F9936570/T86805_-_Boolean_Inconsistency.blend) @howardt Any idea what could cause this?

Howard Trickey commented

2021-04-16 23:01:24 +02:00

Hmm, I tried this with the latest build and could not get it to do this. I did this on my Mac. What platform are you using (I'm hoping this isn't platform specific, but grasping at straws here).

Henrik D. commented

2021-04-17 10:46:46 +02:00

Tested and confirmed with

System Information
Operating system: Linux-5.8.0-2-amd64-x86_64-with-glibc2.31 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.66

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-16 17:44, hash: e524a6ecf7

Can not reproduce with:

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 780/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-16 17:44, hash: e524a6ecf7

So this one seems to be Linux specific.

Tested and confirmed with **System Information** Operating system: Linux-5.8.0-2-amd64-x86_64-with-glibc2.31 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.66 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-16 17:44, hash: `e524a6ecf7` Can not reproduce with: **System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 780/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-16 17:44, hash: `e524a6ecf7` So this one seems to be Linux specific.

Howard Trickey commented

2021-04-17 16:38:47 +02:00

OK, I can get it to happen on Linux, about once out of every 4 times.

blender-admin commented

2021-04-17 20:18:03 +02:00

This issue was referenced by 2d5a715f44

This issue was referenced by 2d5a715f440a22eeeffdc7bbb358dd3975c774bc

Howard Trickey commented

2021-04-17 20:22:30 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Howard Trickey closed this issue

2021-04-17 20:22:30 +02:00

Howard Trickey self-assigned this 2021-04-17 20:22:30 +02:00

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Inconsistent Boolean Behavior (2.93 regression?) #86805