[夜夜]

Project Manager version: 4.01.42
3ds Max version: 2026.2 (28.2.0.20659)

I found an issue when deleting individual materials from a .mat Material Library.

Steps to reproduce:
1. Create a new Material Library.
2. Add two materials to the library.
3. Delete one of the materials in Project Manager.
4. The material disappears from the Project Manager interface.
5. However, the .mat file modification time does not change.
6. Switch to another Material Library and then switch back.
7. The deleted material appears again.

This means the delete operation seems to update only the UI/cache, but the modified Material Library is not saved back to the .mat file.
I tested this with a newly created Material Library, so it is not related to an old library or corrupted file.
Could you please check the Material Library save/write-back routine after deleting an individual material?

Plugin version: 4.01.42
3ds Max version: 2026.2
Renderer: V-Ray

[Oleksandr Kramer]

This bug is fixed in version 4.01.45
You can download the latest version from the dashboard.
Auto-updater will be triggered in a few days if there’s no critical issue found.
Thanks for your feedback.