Issue with shared meshes overwriting modifiers #72733

New Issue

Karja Krähwald · 2019-12-27T17:02:15+01:00

Karja Krähwald commented

2019-12-27 17:02:15 +01:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.31

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

Short description of error

All meshes that have shared mesh data (I mean they use same geometry)
will pop into the scene in edit cage display, regardless of what object you actually edit. Ok so far.

But in addition, they ignore their current modifier setup and use your currently
active object's modifiers to replace their own for the editing time. Why?

This creates bad visualization and editing conflicts, especially when
using those meshes heavily modified (Mask) and dependent on each other.

The current behaviour is very annoying to deal with.
I cant find a way to turn this off, therefore I assume its intended. Please correct me if this isnt true.
Otherwise see my file for a small showcase.

Exact steps for others to reproduce the error
LinkedMeshesOverwrite.blend

Example:

Add a Cube and give it a material.
Create a linked duplication (alt-D) and give it a new material on the same slot (object material) with red color.
Make sure they are placed on the same spot.
Give the second Cube a Skin modifier.
Select the first Cube and go into Edit mode.

Issue:
The first Cube is displayed red now while editing because the second Cube is rendered on top of it.
Issue 2:
You cant see at the same time whats going on for the second Cube with its own modifiers which might be relevant to the editing process. (for example hidden or skinned parts that are connected to the model)

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.31 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-26 19:15, hash: `d35a319687` **Short description of error** All meshes that have shared mesh data (I mean they use same geometry) will pop into the scene in edit cage display, regardless of what object you actually edit. Ok so far. But in addition, they ignore their current modifier setup and use your currently active object's modifiers to replace their own for the editing time. Why? This creates bad visualization and editing conflicts, especially when using those meshes heavily modified (Mask) and dependent on each other. ![LinkedMeshesOverwrite.png](https://archive.blender.org/developer/F8246158/LinkedMeshesOverwrite.png) The current behaviour is very annoying to deal with. I cant find a way to turn this off, therefore I assume its intended. Please correct me if this isnt true. Otherwise see my file for a small showcase. **Exact steps for others to reproduce the error** [LinkedMeshesOverwrite.blend](https://archive.blender.org/developer/F8246047/LinkedMeshesOverwrite.blend) Example: 1. Add a Cube and give it a material. 2. Create a linked duplication (alt-D) and give it a new material on the same slot (object material) with red color. 3. Make sure they are placed on the same spot. 4. Give the second Cube a Skin modifier. 5. Select the first Cube and go into Edit mode. Issue: The first Cube is displayed red now while editing because the second Cube is rendered on top of it. Issue 2: You cant see at the same time whats going on for the second Cube with its own modifiers which might be relevant to the editing process. (for example hidden or skinned parts that are connected to the model)

Karja Krähwald commented

2019-12-27 17:02:15 +01:00

Added subscriber: @karja

blender-admin commented

2019-12-27 17:02:15 +01:00

#68097 was marked as duplicate of this issue

blender-admin commented

2019-12-27 17:02:15 +01:00

#65324 was marked as duplicate of this issue

blender-admin commented

2019-12-27 17:02:15 +01:00

#73352 was marked as duplicate of this issue

Karja Krähwald changed title from ~~Issue with shared meshes overwriting modifiers and edit cage state~~ to Issue with shared meshes overwriting modifiers

2019-12-27 17:03:22 +01:00

Jacques Lucke commented

2019-12-28 13:43:25 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-12-28 13:43:25 +01:00

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

Jacques Lucke commented

2019-12-28 13:43:25 +01:00

2019-12-28 13-41-00.mp4

edit-shared-mesh-bug.blend

[2019-12-28 13-41-00.mp4](https://archive.blender.org/developer/F8248134/2019-12-28_13-41-00.mp4) [edit-shared-mesh-bug.blend](https://archive.blender.org/developer/F8248135/edit-shared-mesh-bug.blend)

Bastien Montagne commented

2020-01-15 11:01:53 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2020-01-15 11:01:53 +01:00

This will most certainly require quite a bit of work to get fixed, so considering it a known issue for now.

Germano Cavalcante commented

2020-01-24 13:55:53 +01:00

Added subscriber: @OliverVillar

Germano Cavalcante commented

2020-01-24 13:56:09 +01:00

Added subscribers: @TherockyDoo, @Jeroen-Bakker, @brecht, @DanielBystedt

Philip Guin commented

2020-01-25 18:46:46 +01:00

Added subscriber: @Frizzil

Jeroen Bakker self-assigned this 2020-02-04 08:02:42 +01:00

Jeroen Bakker commented

2020-02-04 08:02:42 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Jeroen Bakker closed this issue

2020-02-04 08:02:42 +01:00

Jeroen Bakker commented

2020-02-04 08:02:42 +01:00

THe first mentioned issue has been solved. The second part was already solved. Materials are part of the mesh and is shared between the objects.
I will mark this issue completed as I this has fixed based on the mentioned steps to reproduce.

If this is not the case, please open a new issue explaining in detail the steps needed to reproduce.

THe first mentioned issue has been solved. The second part was already solved. Materials are part of the mesh and is shared between the objects. I will mark this issue completed as I this has fixed based on the mentioned steps to reproduce. If this is not the case, please open a new issue explaining in detail the steps needed to reproduce.

Jeroen Bakker commented

2020-05-18 11:31:04 +02:00

Added subscribers: @jeremyhgs, @fclem

blender-admin commented

2022-01-11 15:42:07 +01:00

This issue was referenced by 0f89bcdbeb

This issue was referenced by 0f89bcdbebf5094bd816318774b67c677790ea99

Thomas Dinges added this to the 2.82 milestone 2023-02-08 16:41:38 +01:00

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Issue with shared meshes overwriting modifiers #72733