Sculpting with Dyntopo redo bug #88119

Closed
opened 2021-05-08 02:44:24 +02:00 by Saif Yusuf · 6 comments

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (2.82)

Short description of error
When I try to use Dyntopo Blender becomes pretty buggy, when I for example use the Clay Strips with Dyntopo enabled then I use Ctrl + Z it will not undo, instead, it just draws face sets for some reason on the same area that I used the brush on or hides some part of the mesh, even though on Undo History I am on the original step, and sometimes I use the brush twice to sculpt but on Undo History it only shows one of the steps that I made.

I also tested on the experimental builds such as 3.0.0, 2.93.0 and it occurs in older vers like 2.91, v2.83.12 and they all had the same exact issue, however, on v2.82 it doesn't seem to happen the undo and redo is fine..

Exact steps for others to reproduce the error
I am not sure how to reproduce the issue it's hard to tell.. But if you open the Blender file attached, just try to use any brush in Sculpt mode then Ctrl + Z to undo it, it will draw unwanted face sets and it will not undo the first brush change.
Dyntopo bug.blend

PS: If I tried to draw Face Sets on the mesh attached in the Blender file via disabling Dyntopo first it will draw Face Sets on the mesh but it will have weird holes on some of the faces:
image.png

Also, it acts as if it's a mask when you try to sculpt the colored area:
image.png

Videos where the issue occurs:
https://youtu.be/WZJII8BSCWE

Less complex mesh:
https://youtu.be/gs0SfrlsQIw

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (2.82) **Short description of error** When I try to use Dyntopo Blender becomes pretty buggy, when I for example use the Clay Strips with Dyntopo enabled then I use Ctrl + Z it will not undo, instead, it just draws face sets for some reason on the same area that I used the brush on or hides some part of the mesh, even though on Undo History I am on the original step, and sometimes I use the brush twice to sculpt but on Undo History it only shows one of the steps that I made. I also tested on the experimental builds such as 3.0.0, 2.93.0 and it occurs in older vers like 2.91, v2.83.12 and they all had the same exact issue, however, on v2.82 it doesn't seem to happen the undo and redo is fine.. **Exact steps for others to reproduce the error** I am not sure how to reproduce the issue it's hard to tell.. But if you open the Blender file attached, just try to use any brush in Sculpt mode then Ctrl + Z to undo it, it will draw unwanted face sets and it will not undo the first brush change. [Dyntopo bug.blend](https://archive.blender.org/developer/F10061945/Dyntopo_bug.blend) PS: If I tried to draw Face Sets on the mesh attached in the Blender file via disabling Dyntopo first it will draw Face Sets on the mesh but it will have weird holes on some of the faces: ![image.png](https://archive.blender.org/developer/F10062127/image.png) Also, it acts as if it's a mask when you try to sculpt the colored area: ![image.png](https://archive.blender.org/developer/F10062172/image.png) Videos where the issue occurs: https://youtu.be/WZJII8BSCWE Less complex mesh: https://youtu.be/gs0SfrlsQIw
Author

Added subscriber: @SaifYusufJ

Added subscriber: @SaifYusufJ
Member

Added subscriber: @PratikPB2123

Added subscriber: @PratikPB2123
Member

Changed status from 'Needs Triage' to: 'Needs User Info'

Changed status from 'Needs Triage' to: 'Needs User Info'
Member

With attached file I can confirm that Undoing after one brush stroke will remove triangles of the mesh. May be mesh got corrupted.

Can you reproduce again from scratch? Also: upgrading to fresh builds works for you? (https://builder.blender.org/download/daily)

With attached file I can confirm that Undoing after one brush stroke will remove triangles of the mesh. May be mesh got corrupted. Can you reproduce again from scratch? Also: upgrading to fresh builds works for you? (https://builder.blender.org/download/daily)
Member

Exists a similar report on tracker #80174 (Sculpting with dyntopo using undo causes artifacts or hides random faces)

so marking this ticket as a duplicate of #80174

Thanks for the report :)

Exists a similar report on tracker #80174 (Sculpting with dyntopo using undo causes artifacts or hides random faces) so marking this ticket as a duplicate of `#80174` Thanks for the report :)
Member

Closed as duplicate of #80174

Closed as duplicate of #80174
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Reference: blender/blender#88119
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