Material Utilities add-on incorrectly re-assigns materials when cleaning slots #94119

New Issue

Ryan Andrade · 2021-12-15T17:58:36+01:00

Ryan Andrade commented

2021-12-15 17:58:36 +01:00

System Information
Operating system: Windows 10.0.19042
Graphics card: RTX 2080 Super
CPU: AMD Ryzen 9 3900X

Blender Version
Broken: 3.0.0

Short description of error
When using the Material Utilities plugin to clean slots (remove materials from an object that aren't assigned to any surfaces), material utilities incorrectly re-assigns materials. In previous versions, Material Utilities correctly removes any un-assigned materials, and keeps assigned materials where they were before cleaning slots.

Exact steps for others to reproduce the error

Open attached blend file (must have Material Utilities add-on enabled)
Right click cube > material utilities > clean slots > clean material slots
Expected behavior: Materials 4,5, & 6 should be removed, existing materials should stay as they were before cleaning slots.
Bug: 4,5,&6 are correctly removed, but remaining materials are duplicated and re-assigned randomly on the object (see screenshot).

material utilities test file.blend

Sorry if any of the formatting is wrong, this is my first bug report.

**System Information** Operating system: Windows 10.0.19042 Graphics card: RTX 2080 Super CPU: AMD Ryzen 9 3900X **Blender Version** Broken: 3.0.0 **Short description of error** When using the Material Utilities plugin to clean slots (remove materials from an object that aren't assigned to any surfaces), material utilities incorrectly re-assigns materials. In previous versions, Material Utilities correctly removes any un-assigned materials, and keeps assigned materials where they were before cleaning slots. **Exact steps for others to reproduce the error** 1. Open attached blend file (must have Material Utilities add-on enabled) 2. Right click cube > material utilities > clean slots > clean material slots Expected behavior: Materials 4,5, & 6 should be removed, existing materials should stay as they were before cleaning slots. Bug: 4,5,&6 are correctly removed, but remaining materials are duplicated and re-assigned randomly on the object (see screenshot). ``` ``` ![material-utilities.jpg](https://archive.blender.org/developer/F12748803/material-utilities.jpg) [material utilities test file.blend](https://archive.blender.org/developer/F12748802/material_utilities_test_file.blend) Sorry if any of the formatting is wrong, this is my first bug report.

Ryan Andrade commented

2021-12-15 17:58:36 +01:00

Added subscriber: @RyanAndrade