Material is not applied on MeshInstance when opening scene

[volzhs]

Godot version:

3.2.4 beta 0cea273

OS/device including version:

Radeon RX570, both GLES2 and GLES3

Issue description:

Assigned material is not applied on MeshInstance after reopening scene.
(Assigning material to material_override works as expected)

Steps to reproduce:

1. assign a material on MeshInstance
2. save it
3. close the scene
4. reopen the scene

Minimal reproduction project:

material bug.zip

[volzhs]

probably @pouleyKetchoupp has a clue...

[pouleyKetchoupp]

Ah yes, probably a regression from the software skinning change.

[akien-mga]

No issue for me in 4040cd3, so it's likely a regression from #40313 indeed.

[dsnopek]

I'm seeing this problem as well, but it's not just affecting the scene in the editor after reload: the material also fails to load when running the game from the editor, or when exported. If I move my material from "Material" to "Material Override", then it appears in game again.

[akien-mga]

Fixed by #42846.

[Casqade]

It seems the issue is back in 4.1.1 stable (Compatibility renderer, both Windows and Linux). Although, it's only reproducible with certain Material values.
In my case, a new StandardMaterial3D with following changes is not applied properly upon reopening scene:

• unshaded shading mode
• nearest texture filter
• disabled texture repeat

material_test.webm

[AThousandShips]

Please open a new issue with an MRP