"clean material slot" of material utils add-on not work #116651 #105096

New Issue

nocivo · 2023-12-30T16:14:51+01:00

nocivo commented

2023-12-30 16:14:51 +01:00

System Information
Operating system: Linux-6.6.8-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 545.29.06

Blender Version
Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727
Worked: 2.93.18

Addon Information
Name: Material Utilities (2, 2, 0)
Author: MichaleW, ChrisHinde

Short description of error
The "Clean Material Slots" function in the Material Utils add-on is not working as expected. Instead of removing unassigned slots, it randomly reassigns slots to different polygons. Additionally, it fails to clean the unassigned slot, resulting in a mess outcome. This occurs in both edit and object mode. This function operated correctly up to Blender version 2.93.18. However, it has become entirely inoperable since version 3.0.

Exact steps for others to reproduce the error

Open the default Blender scene.
Create 4 slots with different materials.
Assign three slots to three different polygons of the default cube.
Leave one slot empty.
Apply the "Clean Material Slots" function.
The result is chaotic. The empty slot is not deleted; instead, the add-on assigns it to some randomly selected polygon, and the other slots are reassigned to other randomly selected polygons. Please refer to the attached images, one before and one after applying the material slots.

**System Information** Operating system: Linux-6.6.8-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 545.29.06 **Blender Version** Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: `9be62e85b727` Worked: 2.93.18 **Addon Information** Name: Material Utilities (2, 2, 0) Author: MichaleW, ChrisHinde **Short description of error** The "Clean Material Slots" function in the Material Utils add-on is not working as expected. Instead of removing unassigned slots, it randomly reassigns slots to different polygons. Additionally, it fails to clean the unassigned slot, resulting in a mess outcome. This occurs in both edit and object mode. This function operated correctly up to Blender version 2.93.18. However, it has become entirely inoperable since version 3.0. **Exact steps for others to reproduce the error** - Open the default Blender scene. - Create 4 slots with different materials. - Assign three slots to three different polygons of the default cube. - Leave one slot empty. - Apply the "Clean Material Slots" function. - The result is chaotic. The empty slot is not deleted; instead, the add-on assigns it to some randomly selected polygon, and the other slots are reassigned to other randomly selected polygons. Please refer to the attached images, one before and one after applying the material slots.

before_clean-material-slots.jpeg

292 KiB

after_clean-material-slots.jpeg

293 KiB

nocivo added the

labels 2023-12-30 16:14:51 +01:00

Thomas Barlow referenced a pull request that will close this issue

2023-12-30 18:17:45 +01:00

Fix #105096: Material Utilities: Clean Material Slots fails to remove unused slots #105098

Pratik Borhade commented

2024-01-05 10:38:23 +01:00

Thanks for the report. I can confirm. But do we require this operator? it looks same as existing Cpp operator "Remove unused slots"

Pratik Borhade added

and removed

labels 2024-01-05 10:43:48 +01:00

nocivo commented

2024-01-08 19:14:39 +01:00

Thanks for the report. I can confirm. But do we require this operator? it looks same as existing Cpp operator "Remove unused slots"

I saw it now, I didn't know about this native function. A few years ago there wasn't, it seems to me. But I could be wrong. I always used that of Materials Utilities Addon. OK. However, a bug was corrected, which is always good.

thanks

> Thanks for the report. I can confirm. But do we require this operator? it looks same as existing Cpp operator "Remove unused slots" I saw it now, I didn't know about this native function. A few years ago there wasn't, it seems to me. But I could be wrong. I always used that of Materials Utilities Addon. OK. However, a bug was corrected, which is always good. thanks

Thomas Barlow referenced this issue from a commit

2024-01-11 12:23:51 +01:00

Fix #105096: Material Utilities: Clean Material Slots fails to remove unused slots

Thomas Barlow closed this issue

2024-01-11 12:23:52 +01:00

Blender Bot added

and removed

labels 2024-01-11 12:23:53 +01:00