Mesh with modifiers and multiple materials glitches heavily in edit mode #97789

New Issue

Manu Järvinen · 2022-05-03T05:18:07+02:00

Manu Järvinen commented

2022-05-03 05:18:07 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.59

Blender Version
Broken:

version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: cc66d1020c
Blender 3.1.2 official, Windows
Blender 3.2.0 beta, Windows

Worked:

Blender 2.92 official, Windows
Blender 2.93 official, Windows
Blender 3.0 official, Windows

Short description of error
See this animated GIF, which views the glitching:

When you try to edit the mesh with multiple materials and modifiers, it glitches a lot.

Exact steps for others to reproduce the error

I have the latest of this date NVIDIA STUDIO drivers (downloaded in 2022-05-03)
Open Blender 3.1.2 official, for example
Load factory settings
Subdivide the cube with CTRL+2
Convert the mesh to mesh or apply the subdivision modifier
Delete half of the mesh in front view
Put mirror modifier to it
Subdivide again with CTRL+2
Define two different materials to the mesh (yellow and blue, for example)

Or: Open the .blend file below, go to edit mode and simply try to move some of the faces with G.

As soon as you put the second material in, the mesh starts to glitch in edit mode. Especially when you move vertices or extrude faces.

I think it's very critical to get this fixed, it looks very unreliable even though might be only cosmetic.

edit_mesh_with_multiple_materials_glitching.blend

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.59 **Blender Version** Broken: - version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: `cc66d1020c` - Blender 3.1.2 official, Windows - Blender 3.2.0 beta, Windows Worked: - Blender 2.92 official, Windows - Blender 2.93 official, Windows - Blender 3.0 official, Windows **Short description of error** See this animated GIF, which views the glitching: ![TfEtvoIVRM.gif](https://archive.blender.org/developer/F13048123/TfEtvoIVRM.gif) When you try to edit the mesh with multiple materials and modifiers, it glitches a lot. **Exact steps for others to reproduce the error** - I have the latest of this date NVIDIA STUDIO drivers (downloaded in 2022-05-03) - Open Blender 3.1.2 official, for example - Load factory settings - Subdivide the cube with CTRL+2 - Convert the mesh to mesh or apply the subdivision modifier - Delete half of the mesh in front view - Put mirror modifier to it - Subdivide again with CTRL+2 - Define two different materials to the mesh (yellow and blue, for example) Or: Open the .blend file below, go to edit mode and simply try to move some of the faces with G. As soon as you put the second material in, the mesh starts to glitch in edit mode. Especially when you move vertices or extrude faces. I think it's very critical to get this fixed, it looks very unreliable even though might be only cosmetic. [edit_mesh_with_multiple_materials_glitching.blend](https://archive.blender.org/developer/F13048168/edit_mesh_with_multiple_materials_glitching.blend)

Manu Järvinen commented

2022-05-03 05:18:07 +02:00

Added subscriber: @ManuJarvinen

Pratik Borhade commented

2022-05-03 06:39:57 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-05-03 06:49:32 +02:00

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

Pratik Borhade commented

2022-05-03 06:49:32 +02:00

Thanks for the report.
This looks same as in #96845 (Regression: GPU Subdivision with mirror/Array modifier shows artifacts)
Disable GPU subdivision and see if that works for you: {nav Edit > Preferences > Viewport > Subdivision > GPU Subdivision}

Thanks for the report. This looks same as in #96845 (Regression: GPU Subdivision with mirror/Array modifier shows artifacts) Disable GPU subdivision and see if that works for you: {nav Edit > Preferences > Viewport > Subdivision > GPU Subdivision}

Manu Järvinen commented

2022-05-03 07:54:05 +02:00

In #97789#1350666, @PratikPB2123 wrote:
Thanks for the report.
This looks same as in #96845 (Regression: GPU Subdivision with mirror/Array modifier shows artifacts)
Disable GPU subdivision and see if that works for you: {nav Edit > Preferences > Viewport > Subdivision > GPU Subdivision}

Yes, you're right!
This workaround works :)
Thank you for the advice.

I hope that the issue will get solved some day, though.

> In #97789#1350666, @PratikPB2123 wrote: > Thanks for the report. > This looks same as in #96845 (Regression: GPU Subdivision with mirror/Array modifier shows artifacts) > Disable GPU subdivision and see if that works for you: {nav Edit > Preferences > Viewport > Subdivision > GPU Subdivision} Yes, you're right! This workaround works :) Thank you for the advice. I hope that the issue will get solved some day, though.

Pratik Borhade commented

2022-05-03 08:44:13 +02:00

Thanks for the update. Closing this report as a duplicate of #96845

Pratik Borhade commented

2022-05-03 08:44:28 +02:00

Closed as duplicate of #96845

Pratik Borhade closed this issue

2022-05-03 08:44:28 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Mesh with modifiers and multiple materials glitches heavily in edit mode #97789