QuadriFlow's Preserve Sharp option creates triangle holes #70546

New Issue

Frozen_Death_Knight · 2019-10-05T02:56:31+02:00

2019-10-05 02:56:31 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.81 (sub 13), branch: master, commit date: 2019-10-04 22:33, hash: ab519b91b2

Short description of error
Preserve Sharp creates triangle holes in the mesh.

Exact steps for others to reproduce the error
Just take the standard cube and go into Sculpt Mode. Use the settings that are shown in the screenshot. There should be two triangle holes appearing on two sides of the cube.

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30 **Blender Version** Broken: version: 2.81 (sub 13), branch: master, commit date: 2019-10-04 22:33, hash: `ab519b91b2` **Short description of error** Preserve Sharp creates triangle holes in the mesh. ![Preserve Sharp triangle holes.png](https://archive.blender.org/developer/F7790110/Preserve_Sharp_triangle_holes.png) **Exact steps for others to reproduce the error** Just take the standard cube and go into Sculpt Mode. Use the settings that are shown in the screenshot. There should be two triangle holes appearing on two sides of the cube.

Frozen_Death_Knight commented

2019-10-05 02:56:31 +02:00

Added subscriber: @Frozen_Death_Knight

Sebastian Parborg commented

2019-10-07 12:12:58 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-10-07 12:12:58 +02:00

Can't reproduce this.

Can't reproduce this. ![screenshot.png](https://archive.blender.org/developer/F7794438/screenshot.png)

Frozen_Death_Knight commented

2019-10-07 15:39:10 +02:00

@ZedDB Here's a test file and a video showing the problem.

Desktop 2019.10.07 - 15.34.50.01.mp4

QuadriFlow triangle holes test file.blend

@ZedDB Here's a test file and a video showing the problem. [Desktop 2019.10.07 - 15.34.50.01.mp4](https://archive.blender.org/developer/F7794648/Desktop_2019.10.07_-_15.34.50.01.mp4) [QuadriFlow triangle holes test file.blend](https://archive.blender.org/developer/F7794646/QuadriFlow_triangle_holes_test_file.blend)

Sebastian Parborg commented

2019-10-07 19:22:57 +02:00

I can reproduce with that .blend file but not the default scene.

Do you have any idea what you did to make this happen in your scene?

I can reproduce with that .blend file but not the default scene. Do you have any idea what you did to make this happen in your scene?

Frozen_Death_Knight commented

2019-10-07 19:33:24 +02:00

In #70546#791275, @ZedDB wrote:
I can reproduce with that .blend file but not the default scene.

Do you have any idea what you did to make this happen in your scene?

Really hard for me to know this, since I have used a customised UI since I started using Blender last December. If there is a way for me to reset to standard settings without losing my old stuff, I could try and find out if it's anything I have changed on my end.

> In #70546#791275, @ZedDB wrote: > I can reproduce with that .blend file but not the default scene. > > Do you have any idea what you did to make this happen in your scene? Really hard for me to know this, since I have used a customised UI since I started using Blender last December. If there is a way for me to reset to standard settings without losing my old stuff, I could try and find out if it's anything I have changed on my end.

Sebastian Parborg commented

2019-10-07 19:41:39 +02:00

You could just be able to load factory default under File -> Defaults -> Load Factory Settings and it should overwrite anything unless you explicitly save your settings after resetting.

You could just be able to load factory default under `File -> Defaults -> Load Factory Settings` and it should overwrite anything unless you explicitly save your settings after resetting.

Frozen_Death_Knight commented

2019-10-07 21:30:52 +02:00

In #70546#791313, @ZedDB wrote:
You could just be able to load factory default under File -> Defaults -> Load Factory Settings and it should overwrite anything unless you explicitly save your settings after resetting.

I just did what you said and I got the exact same results you got with the factory settings. This is very odd to say the least.

> In #70546#791313, @ZedDB wrote: > You could just be able to load factory default under `File -> Defaults -> Load Factory Settings` and it should overwrite anything unless you explicitly save your settings after resetting. I just did what you said and I got the exact same results you got with the factory settings. This is very odd to say the least.

Sebastian Parborg self-assigned this 2019-10-08 11:38:26 +02:00

Sebastian Parborg commented

2019-10-08 11:38:26 +02:00

Let me know if you manage to figure out what is causing this as it seems like it must be a scene setting or something. I'm just as confused as you.

Frozen_Death_Knight commented

2019-10-08 13:26:23 +02:00

@zddb Apparently activating and deactivating symmetry x, y, and z gives completely different results. When all of them and x and y were activated, the cube became whole again. When none were active, only one triangle appeared.

Frozen_Death_Knight commented

2019-10-08 15:37:55 +02:00

@ZedDB I decided to do a reset back to the factory settings and rebuild my Blender version by adding back my add-ons, favourites, and so on. That seemed to have solved the problem for me regarding the basic cube, but I would wait with closing my bug report for about a week when I have had the chance to work in Blender and QuadriFlow some more. If it appears again despite having done the reset, I will inform you about it.

Sebastian Parborg commented

2019-10-08 17:02:24 +02:00

Yes absolutely! We'll keep this open until you have done some more testing.

Zachary commented

2019-10-08 20:37:48 +02:00

Added subscriber: @AFWS

Zachary commented

2019-10-08 20:37:48 +02:00

Seeing this also. You don't even have to do it in Sculpt Mode.

Edit:
Looks like it's related to the "Use Paint Symmetry" option. If you turn that off, it doesn't make the holes.

OK, should be able to follow these steps and reproduce the problem.

1: Select default cube
2: Select QuadriFlow Remesh and change settings to match above.
3: Remesh
4: Cube should be fine
5: Delete cube
6: Add another cube and remesh this one
7: Cube should have holes.
8: Undo
9: Turn off "Use Paint Symmetry" ,cube now has no holes.
10 Undo
11: Turn on "Use Paint Symmetry" ,cube now has holes.

Seeing this also. You don't even have to do it in Sculpt Mode. Edit: Looks like it's related to the "Use Paint Symmetry" option. If you turn that off, it doesn't make the holes. ![cube_remesh_hole.jpg](https://archive.blender.org/developer/F7797135/cube_remesh_hole.jpg) OK, should be able to follow these steps and reproduce the problem. 1: Select default cube 2: Select QuadriFlow Remesh and change settings to match above. 3: Remesh 4: Cube should be fine 5: Delete cube 6: Add another cube and remesh this one 7: Cube should have holes. 8: Undo 9: Turn off "Use Paint Symmetry" ,cube now has no holes. 10 Undo 11: Turn on "Use Paint Symmetry" ,cube now has holes.

Zino Guerr commented

2019-10-09 12:32:41 +02:00

Added subscriber: @Znio.G

Zino Guerr commented

2019-10-09 12:32:41 +02:00

I too have this with my custom setup,Preserve Sharp is the one that gives me two non-manifold tris with the default Cube even with the provided blend file.

Frozen_Death_Knight commented

2019-10-21 18:20:10 +02:00

@ZedDB The bug reappeared again, sorry to say. I will have to check again what's causing it at some point, but it will take a while probably.

Pablo Dobarro commented

2020-01-09 22:50:17 +01:00

Added subscriber: @PabloDobarro

Pablo Dobarro commented

2020-01-09 22:50:18 +01:00

We are aware that the way Quadriflow works has a lot of limitation and it can fail in quite some cases. This is unlikely something that can be fixed for a specific case or model, but something that is going to eventually improve as we continue developing and polishing Quadriflow. I consider the report design limitation of how Quadriflow currently works.

Aaron Carlisle commented

2020-02-17 16:27:54 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Philipp Oeser removed the

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QuadriFlow's Preserve Sharp option creates triangle holes #70546