Sculpt Box Hide Undo+Redo cause artifacts when using smooth shading #72721

New Issue

Pasang Bomjan · 2019-12-27T06:33:22+01:00

Pasang Bomjan commented

2019-12-27 06:33:22 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.66

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-26 19:15, hash: d35a319687
Worked: (optional)

Short description of error
After using box hide tool and doing Undo + Redo, it creates visible artifacts...

Exact steps for others to reproduce the error

Open the attached blend file and in sculpt mode, use the box hide tool to hide a part of the mesh.
Then Undo the last step and then Redo it.

Box Hide Undo Redo Bug.mp4

I get that issue in both of my machines. And I also checked by exporting and importing as an OBJ but always get the same case.
Here's the exact file.
Box Hide Undo Redo Bug.blend

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.66 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-26 19:15, hash: `d35a319687` Worked: (optional) **Short description of error** After using box hide tool and doing Undo + Redo, it creates visible artifacts... **Exact steps for others to reproduce the error** 1. Open the attached blend file and in sculpt mode, use the box hide tool to hide a part of the mesh. 2. Then Undo the last step and then Redo it. [Box Hide Undo Redo Bug.mp4](https://archive.blender.org/developer/F8245647/Box_Hide_Undo_Redo_Bug.mp4) I get that issue in both of my machines. And I also checked by exporting and importing as an OBJ but always get the same case. Here's the exact file. [Box Hide Undo Redo Bug.blend](https://archive.blender.org/developer/F8245649/Box_Hide_Undo_Redo_Bug.blend)

Pasang Bomjan commented

2019-12-27 06:33:22 +01:00

Added subscriber: @Pasang

blender-admin commented

2019-12-27 06:33:22 +01:00

#73367 was marked as duplicate of this issue

ronsn commented

2019-12-27 19:25:35 +01:00

Added subscriber: @ronsn

ronsn commented

2019-12-27 19:25:35 +01:00

@Pasang Is that video you uploaded playing in your browser? Here on Linux in Chromium and Firefox it is not playable.

Pasang Bomjan commented

2019-12-28 06:08:44 +01:00

@ronsn It should play in Chrome. But it sometimes doesn't play in Edge. Can you try downloading the video?

Philipp Oeser commented

2019-12-28 13:01:36 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-12-28 13:01:36 +01:00

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

Philipp Oeser commented

2019-12-28 13:01:36 +01:00

I can confirm, looks like this here:

I can confirm, looks like this here: ![image.png](https://archive.blender.org/developer/F8248059/image.png)

ronsn commented

2019-12-28 15:14:34 +01:00

@Pasang Downloading the video worked. I can confirm the issue too, but I couldn't reproduce it on other meshes with much higher poly count. Is this the only mesh, where that issue occurred?
Looks like art somehow

@Pasang Downloading the video worked. I can confirm the issue too, but I couldn't reproduce it on other meshes with much higher poly count. Is this the only mesh, where that issue occurred? Looks like art somehow ![Bildschirmfoto vom 2019-12-28 15-08-55.png](https://archive.blender.org/developer/F8248203/Bildschirmfoto_vom_2019-12-28_15-08-55.png)

Pasang Bomjan commented

2019-12-29 07:08:47 +01:00

@ronsn Curiously yes. It doesn't happen in any other meshes. Maybe something's wrong with it's mesh data. I tried with OBJ and FBX export-import but same issue.

ronsn commented

2019-12-29 14:47:12 +01:00

@Pasang The Issue does not occur in Blender 2.79 but in Blender 2.80, so somewhere in between those versions there must be the commit which is responsible for that issue. Bad news is, I cannot compile Blender 2.79 on this machine to find the exact commit.
What kind of worked was to remesh the frog and maybe that might be a solution for you for now.

@Pasang The Issue does not occur in Blender 2.79 but in Blender 2.80, so somewhere in between those versions there must be the commit which is responsible for that issue. Bad news is, I cannot compile Blender 2.79 on this machine to find the exact commit. What kind of worked was to remesh the frog and maybe that might be a solution for you for now.

Pablo Dobarro changed title from ~~Sculpt Box Hide Undo+Redo cause artifacts~~ to Sculpt Box Hide Undo+Redo cause artifacts when using smooth shading

2020-01-09 20:11:39 +01:00

Pablo Dobarro commented

2020-01-09 20:14:30 +01:00

Added subscriber: @PabloDobarro

Pablo Dobarro commented

2020-01-09 20:14:30 +01:00

After investigating, the bug is not related to that particular mesh, It can also be reproduced by subdividing any other mesh to a point it creates multiple nodes and setting it to smooth shading.

If this is not fixed before, we may revisit this again after reviewing the design and merging the new visibility system in D6070, because that could also fix this issue.

After investigating, the bug is not related to that particular mesh, It can also be reproduced by subdividing any other mesh to a point it creates multiple nodes and setting it to smooth shading. If this is not fixed before, we may revisit this again after reviewing the design and merging the new visibility system in [D6070](https://archive.blender.org/developer/D6070), because that could also fix this issue.

Richard Antalik commented

2020-01-27 13:56:24 +01:00

Added subscriber: @Facu

blender-admin commented

2020-02-06 22:14:18 +01:00

This issue was referenced by f4411b58ad

This issue was referenced by f4411b58ade1d4d0921243756ecd3499e8d11cd2

Pablo Dobarro commented

2020-02-25 19:02:31 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Pablo Dobarro closed this issue

2020-02-25 19:02:31 +01:00

Pablo Dobarro self-assigned this 2020-02-25 19:02:31 +01:00

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Sculpt Box Hide Undo+Redo cause artifacts when using smooth shading #72721