Boolean Modifier Union Operation creates inside topology --> creates sculpting issues #69629

Closed
opened 2019-09-08 01:09:32 +02:00 by Daniel-Marcel · 7 comments

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.71

Blender Version
Broken: version: 2.81 (sub 8), branch: master, commit date: 2019-09-07 20:51, hash: 4764362ebb
Worked: (optional)

Short description of error
When using a boolean modifier to unite two objects, sometimes geometry is created inside the mesh. This states a Problem as this makes it impossible to smooth out the connection between the combined Object. (It gets even worse)
Moving the objects around in a trial & error fashion can solve this issue, however that requires a lot of time and is far from optimal.
I often use the boolean modifier to join the palm of a hand with the indiviual fingers. That is also the case for the attached file, where we can see that out of five fingers only the middle finger is combined optimal.
I tried "Select" -->"Select all by trait"--> "Interior Faces" to clean up the inside topology, but it did not recognize any of it.
I have experienced the issue in several Versions of Blender: 2.78, 2.79 and now 2.8, but did not know about the report feature until the official youtube channels video about bug reporting.

Exact steps for others to reproduce the error

  1. Open attached file
  2. Select Palm
  3. Go into local view
  4. (optional, just for reviewing) look inside the mesh
    {F7722450 size=full}
  5. apply modifiers
  6. try sculpting
    {F7722467 size=full}

BooleanError.blend

Thank you very much for your hard work.

**System Information** Operating system: Windows-10-10.0.17134 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.71 **Blender Version** Broken: version: 2.81 (sub 8), branch: master, commit date: 2019-09-07 20:51, hash: `4764362ebb` Worked: (optional) **Short description of error** When using a boolean modifier to unite two objects, sometimes geometry is created inside the mesh. This states a Problem as this makes it impossible to smooth out the connection between the combined Object. (It gets even worse) Moving the objects around in a trial & error fashion can solve this issue, however that requires a lot of time and is far from optimal. I often use the boolean modifier to join the palm of a hand with the indiviual fingers. That is also the case for the attached file, where we can see that out of five fingers only the middle finger is combined optimal. I tried "Select" -->"Select all by trait"--> "Interior Faces" to clean up the inside topology, but it did not recognize any of it. I have experienced the issue in several Versions of Blender: 2.78, 2.79 and now 2.8, but did not know about the report feature until the official youtube channels video about bug reporting. **Exact steps for others to reproduce the error** 1. Open attached file 2. Select Palm 3. Go into local view 4. (optional, just for reviewing) look inside the mesh {[F7722450](https://archive.blender.org/developer/F7722450/image.png) size=full} 5. apply modifiers 6. try sculpting {[F7722467](https://archive.blender.org/developer/F7722467/image.png) size=full} [BooleanError.blend](https://archive.blender.org/developer/F7722422/BooleanError.blend) Thank you very much for your hard work.
Author

Added subscriber: @DonWippo

Added subscriber: @DonWippo

Added subscriber: @flaviengiroud

Added subscriber: @flaviengiroud

your objects are too small and far away from the center, thats the issue Boolean_ok.blend

your objects are too small and far away from the center, thats the issue [Boolean_ok.blend](https://archive.blender.org/developer/F7825165/Boolean_ok.blend)
Author

Thank you very much Flavien giroud.
I Tried it out myself and it works perfectly fine.
Although it is still a hassle to move your objects close to the center (and maybe scale them).
Especially when you are working on a character and the hand needs to be rearranged after the boolean operation.

I changed the Type to Design, as this is apparently not a bug but the way the boolean operation works
I hope it is the right Category for improving existing features.

Thank you very much Flavien giroud. I Tried it out myself and it works perfectly fine. Although it is still a hassle to move your objects close to the center (and maybe scale them). Especially when you are working on a character and the hand needs to be rearranged after the boolean operation. I changed the Type to Design, as this is apparently not a bug but the way the boolean operation works I hope it is the right Category for improving existing features.

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

Changed status from 'Needs Triage' to: 'Confirmed'
Howard Trickey self-assigned this 2020-09-04 16:10:19 +02:00
Member

Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
Member

I believe the new Exact mode for boolean works for your case without requiring that you move the geometry near the center.

I believe the new Exact mode for boolean works for your case without requiring that you move the geometry near the center.
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Reference: blender/blender#69629
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