Blender importer adds long suffix to root node name

[rcorre]

Godot version

4.2.beta.custom_build.50d17f6b8

System information

Linux 6.5.8-arch1-1

Issue description

Root nodes of files imported using the blender importer have a hash after the name, e.g. Character-e1c248ae26fc8808362fd6c8fbab07b3. I don't have the same issue with a .glb import of the same file.

Steps to reproduce

1. Open the project
2. Open the blend file in Godot
3. Note the root name has a long suffix
4. Open the .glb file
5. Note the root name does not have a long suffix

Minimal reproduction project

example.zip

[Shigewara]

Have same issue on 4.2 Beta 3 on Windows 10 x64

[rcorre]

As a workaround, you can set RootName in the import options.

[fire]

Looking into it

[akien-mga]

I wrongly assumed that this would be a regression, I checked in earlier dev snapshots and in 4.0-stable, 4.1-stable and 4.1.3-stable, they all behave the same. So it's not critical for the 4.2 release.

Edit: My bad, I was checking the advanced importer and not instantiating the scenes. The problem is with the name of the root node of the instantiated scene. There is indeed a regression there.

In all Godot versions, the advanced importer looks similar:

The MeshData has the hash in all Godot versions, unlike the .glb.

What changed recently is that the scene root seems to take its name from the mesh data.

In 4.2-beta5:

In 4.1.3-stable:

[akien-mga]

Tested intermediate 4.2 dev/beta snapshots.

The regression was introduced in 4.2-dev5 (dev4 doesn't have the bug).

Didn't bisect further but #80272 sounds possibly related, CC @aaronfranke.

[aaronfranke]

This was caused by #79774, not #80272. I opened #84678 to fix this, and did a thorough investigation.