White line in 3D view in editor using Metal on MacOS

[Snowdaw]

Tested versions

Happens in v4.4.dev.custom_build [3b3d622]
It says custom due to my spotty internet not being able to successfully git clone the repository. I used the ZIP download which doesn't include the .git folder. This is just a normal build using 3b3d622.

System information

Godot v4.4.dev unknown - macOS 14.3.1 - Metal (Mobile) - integrated Apple M1 (Apple7) - Apple M1 (8 Threads)

Issue description

When loading in a newly created project a white line can be seen in the 3D view.

Steps to reproduce

1. Use an editor build with Metal on MacOS (3b3d622 in my case)
2. Create a new project
3. Observe the white line

Minimal reproduction project (MRP)

N/A

[AThousandShips]

CC @stuartcarnie @clayjohn @bruvzg

[stuartcarnie]

@AThousandShips can reproduce, but only when selecting the Mobile OpenGL renderer; Metal is working 👍🏻

[Snowdaw]

Hi @stuartcarnie I can confirm that it does not happen when launching with --rendering-driver metal
I assumed that Metal would be enabled by default as is written in #88199
Together with the rather confusing OpenGL API 4.1 Metal message when using OpenGL and just Metal 3.1 when using Metal. I just assumed it was using Metal when I saw it in the first message.

Is it correct behaviour that OpenGL is used by default even when Metal is available?

[clayjohn]

Just to clarify, the Mobile renderer does use Metal/Vulkan. Only the Compatibility renderer uses OpenGL

[stuartcarnie]

@clayjohn ahh TIL! Sorry for the confusion.

[Calinou]

• Related to Black Flickering on Editor Axes #91107.

[bruvzg]

Help -> System Info shows the driver and method only based on project settings and ignore command line arguments/fallback (should be fixed by #95887)

And macOS native OpenGL renderer does have Metal in the name at least on Apple Silicon. So it might be confusing.