Material Utilities Addon can't get all materials? #100387

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RedHaloStudio · 2022-08-13T14:29:08+02:00

RedHaloStudio commented

2022-08-13 14:29:08 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94

Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-11 23:16, hash: blender/blender@282a861e11
Worked: ?

Short description of error
The Material Utilities add-on fails to display all materials, because it attempts to access material.preview.icon_id for grease pencil materials, which do not have a preview.

Traceback (most recent call last):
  File "Z:\02_software\blender-3.4.0-alpha+master.b5e92c3dfe70-windows.amd64-release\3.4\scripts\addons\materials_utils\menus.py", line 57, in draw
    icon_value = material.preview.icon_id)
AttributeError: 'NoneType' object has no attribute 'icon_id'

Exact steps for others to reproduce the error

Enable the Material Utilities add-on
Switch the Display Mode of the Outliner to Blender File and open the materials section
Press Shift + Q and choose Assign Material
Observe missing materials and error on console

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94 **Blender Version** Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-11 23:16, hash: `blender/blender@282a861e11` Worked: ? **Short description of error** The Material Utilities add-on fails to display all materials, because it attempts to access `material.preview.icon_id` for grease pencil materials, which do not have a preview. ``` Traceback (most recent call last): File "Z:\02_software\blender-3.4.0-alpha+master.b5e92c3dfe70-windows.amd64-release\3.4\scripts\addons\materials_utils\menus.py", line 57, in draw icon_value = material.preview.icon_id) AttributeError: 'NoneType' object has no attribute 'icon_id' ``` ![BUG.jpg](https://archive.blender.org/developer/F13376879/BUG.jpg) **Exact steps for others to reproduce the error** - Enable the Material Utilities add-on - Switch the *Display Mode* of the Outliner to *Blender File* and open the materials section - Press Shift + Q and choose *Assign Material* - Observe missing materials and error on console

RedHaloStudio commented

2022-08-13 14:29:08 +02:00

Added subscriber: @HMRP

Robert Guetzkow commented

2022-08-14 00:08:21 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2022-08-14 00:08:21 +02:00

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

Robert Guetzkow commented

2022-08-14 00:08:21 +02:00

The "Dots Stroke" material is a default material created for grease pencil brush strokes. Hence, it is not an assignable material for meshes. Could you please explain which exact steps result in an error message being displayed?

RedHaloStudio commented

2022-08-15 05:55:58 +02:00

In #100387#1403440, @rjg wrote:
The "Dots Stroke" material is a default material created for grease pencil brush strokes. Hence, it is not an assignable material for meshes. Could you please explain which exact steps result in an error message being displayed?

Loading Factory Setting or delete all blender profiles,open blender appliation, the material 'Dots Stroke' will display in outline

> In #100387#1403440, @rjg wrote: > The "Dots Stroke" material is a default material created for grease pencil brush strokes. Hence, it is not an assignable material for meshes. Could you please explain which exact steps result in an error message being displayed? Loading Factory Setting or delete all blender profiles,open blender appliation, the material 'Dots Stroke' will display in outline

Robert Guetzkow commented

2022-08-15 09:02:08 +02:00

I'm aware that this material always exists, hence I stated that it is the default material for grease pencil brush strokes. It is therefore correct, that the add-on does not allow to select this material for meshes as it is only for grease pencil. What I was asking about was your reference to "Material_utils/menus.py-> line 57". Is there any exception raised in this particular line if you interact with the add-on or is this the line you believed to be incorrectly implemented?

RedHaloStudio commented

2022-08-15 10:11:59 +02:00

This add-on fetches all materials, including grease pencil brush, but this material does not have the icon_id attribute, so the first 2 commands of this add-on will report an error.
这个插件会获取所有材质，包括蜡笔的材质。但是这个材质又没有 icon_id这个属性，所以这个插件的前2个命令都会报错。

This add-on fetches all materials, including grease pencil brush, but this material does not have the icon_id attribute, so the first 2 commands of this add-on will report an error. 这个插件会获取所有材质，包括蜡笔的材质。但是这个材质又没有 icon_id这个属性，所以这个插件的前2个命令都会报错。 ![GIF 2022-08-15 16-06-22.gif](https://archive.blender.org/developer/F13386893/GIF_2022-08-15_16-06-22.gif)

Robert Guetzkow commented

2022-08-15 11:23:32 +02:00

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

Robert Guetzkow commented

2022-08-15 11:23:32 +02:00

Apologies for the misunderstanding on my part.

The add-on does not support grease pencil materials. The attempt to access the non-existent icon_id for grease pencil materials is one of several issues. Currently, the add-on also does not check whether the material can be assigned to the particular object type. In the current state in Blender 3.4.0 it does not appear to be useable at all.

There is a more recent version that is supposed to address these issues on @ChristopherHindefjord's GitHub , but it has not been merged into Blender yet. The open ticket for this is #90683.

Apologies for the misunderstanding on my part. The add-on does not support grease pencil materials. The attempt to access the non-existent `icon_id` for grease pencil materials is one of several issues. Currently, the add-on also does not check whether the material can be assigned to the particular object type. In the current state in Blender 3.4.0 it does not appear to be useable at all. There is a more recent version that is supposed to address these issues on @ChristopherHindefjord's [GitHub ](https://github.com/ChrisHinde/MaterialUtilities), but it has not been merged into Blender yet. The open ticket for this is #90683.

Robert Guetzkow commented

2022-08-15 11:25:32 +02:00

Added subscriber: @ChristopherHindefjord