Bad topology after applying modifiers #104973

New Issue

Matt Barlow · 2023-10-23T21:00:46+02:00

Matt Barlow commented

2023-10-23 21:00:46 +02:00

System Information
Operating system: Linux-5.15.0-88-generic-x86_64-with-glibc2.35 64 Bits
Graphics card: Mesa Intel(R) HD Graphics 520 (SKL GT2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1

Blender Version
Broken: version: 3.2.2, branch: master, commit date: 2022-08-02 18:15, hash: rBbcfdb14560e7
Worked: (newest version of Blender that worked as expected)

Short description of error
[Please fill out a short description of the error here]
When I use this modifier to add or subtract one mesh from another, then apply the modifier the resulting mesh is all messed up. If I start with clean mesh models then apply the modifier the final mesh has really bad topology. Even if using an addon tool like Boxcutter/Hard Ops. The output stl file renders a model with terrible mesh topology.

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
The attached .blend file is just a super quick example. All I did was add a 20mm circle with 64 vertices. Then, in edit mode, extruded it to 10mm in the Z. I then added another circle, with 24 vertices and extruded it down 5mm from the top edge. I then used the Bool Tool to combine the 2 objects. All the inner vertices from the small over-laping cylinder are still there, even after applying the modifier. This is just with 2 very basic cylinders. I'm modeling complex objects and having a heck of time with them.

I use the 3D Print addon to help clean things up but that doesn't always work, neither does the "Make Manifold." Slicers won't slice the file if it's a complex model, 10k vertices or more.

[Based on the default startup or an attached .blend file (as simple as possible)]
It's not based on the default setup. I've made changes to the default start-up.

Any help is greatly appreciated.

System Information
Operating system: Linux-5.15.0-88-generic-x86_64-with-glibc2.35 64 Bits, WAYLAND UI
Graphics card: Mesa Intel(R) HD Graphics 520 (SKL GT2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1

Blender Version
Broken: version: 3.6.5, branch: blender-v3.6-release, commit date: 2023-10-16 14:30, hash: cf1e1ed46b7e
Worked: (newest version of Blender that worked as expected)

Addon Information
Name: Bool Tool (0, 4, 1)
Author: Vitor Balbio, Mikhail Rachinskiy, TynkaTopi, Meta-Androcto, Simon Appelt

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

System Information Operating system: Linux-5.15.0-88-generic-x86_64-with-glibc2.35 64 Bits Graphics card: Mesa Intel(R) HD Graphics 520 (SKL GT2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1 Blender Version Broken: version: 3.2.2, branch: master, commit date: 2022-08-02 18:15, hash: rBbcfdb14560e7 Worked: (newest version of Blender that worked as expected) Short description of error [Please fill out a short description of the error here] When I use this modifier to add or subtract one mesh from another, then apply the modifier the resulting mesh is all messed up. If I start with clean mesh models then apply the modifier the final mesh has really bad topology. Even if using an addon tool like Boxcutter/Hard Ops. The output stl file renders a model with terrible mesh topology. Exact steps for others to reproduce the error [Please describe the exact steps needed to reproduce the issue] The attached .blend file is just a super quick example. All I did was add a 20mm circle with 64 vertices. Then, in edit mode, extruded it to 10mm in the Z. I then added another circle, with 24 vertices and extruded it down 5mm from the top edge. I then used the Bool Tool to combine the 2 objects. All the inner vertices from the small over-laping cylinder are still there, even after applying the modifier. This is just with 2 very basic cylinders. I'm modeling complex objects and having a heck of time with them. I use the 3D Print addon to help clean things up but that doesn't always work, neither does the "Make Manifold." Slicers won't slice the file if it's a complex model, 10k vertices or more. [Based on the default startup or an attached .blend file (as simple as possible)] It's not based on the default setup. I've made changes to the default start-up. Any help is greatly appreciated. ----------------------------------------------------------------------- **System Information** Operating system: Linux-5.15.0-88-generic-x86_64-with-glibc2.35 64 Bits, WAYLAND UI Graphics card: Mesa Intel(R) HD Graphics 520 (SKL GT2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1 **Blender Version** Broken: version: 3.6.5, branch: blender-v3.6-release, commit date: 2023-10-16 14:30, hash: `cf1e1ed46b7e` Worked: (newest version of Blender that worked as expected) **Addon Information** Name: Bool Tool (0, 4, 1) Author: Vitor Balbio, Mikhail Rachinskiy, TynkaTopi, Meta-Androcto, Simon Appelt **Short description of error** [Please fill out a short description of the error here] **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)]

booltool issues.blend

863 KiB

Matt Barlow added the

labels 2023-10-23 21:00:47 +02:00

Richard Antalik commented

2023-10-26 17:48:22 +02:00

I can confirm some issues with difference tool. But can you provide .blend file with 2 separate objects before operation fails? This makes it easier for us to reproduce the exact same issue.

Pratik Borhade added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2023-11-10 07:42:26 +01:00

sw-tya commented

2024-02-06 00:27:04 +01:00

I've re-created an example of this using two mesh->cylinder objects.

The issue is that the Bool solver routine does a poor job at detecting a common overlapping plane. With a very minor shift in the Z-axis offset of either cylinder the planes become, well err, non-planar which results in a 'good' mesh. However this is not useful for some output jobs that require a continuous surface.

If the X position of the cylinder.001 is altered a bit then the shape of the messy mesh will change to a new random pattern.

I've re-created an example of this using two mesh->cylinder objects. The issue is that the Bool solver routine does a poor job at detecting a common overlapping plane. With a very minor shift in the Z-axis offset of either cylinder the planes become, well err, non-planar which results in a 'good' mesh. However this is not useful for some output jobs that require a continuous surface. ![Screenshot_issue_104973.png](/attachments/4fa6da2d-9c77-4976-a290-3b44ef44cc45) If the X position of the cylinder.001 is altered a bit then the shape of the messy mesh will change to a new random pattern.

Screenshot_issue_104973.png

269 KiB

sw-tya commented

2024-02-06 00:41:50 +01:00

Blend file for the intersecting cylinders. Created using 3.6.3 on Linux Mint.
Started from a new file - deleted everything, then add two mesh cylinders with slightly different sizes.
Select one then add a Boolean modifier.
At this point I duplicated the collection and moved it in Y axis.
Solver options selected were in conjunction with the Union operator, made some difference to the resulting mesh, but nothing "good". The Fast solver option is not usable for anything, the shape just turns to garbage for a non-zero overlap Threshold value.

Blend file for the intersecting cylinders. Created using 3.6.3 on Linux Mint. Started from a new file - deleted everything, then add two mesh cylinders with slightly different sizes. Select one then add a Boolean modifier. At this point I duplicated the collection and moved it in Y axis. Solver options selected were in conjunction with the Union operator, made some difference to the resulting mesh, but nothing "good". The Fast solver option is not usable for anything, the shape just turns to garbage for a non-zero overlap Threshold value.

reprod_issue_104973.blend

892 KiB

Richard Antalik commented

2024-02-12 22:00:29 +01:00

Can confirm. There is already same report in blender repo blender/blender#116404 so will close this report.

Richard Antalik closed this issue

2024-02-12 22:00:31 +01:00

Blender Bot added

Status

Archived

and removed

Status