Vulkan: LightmapGI generates completely black output and probes on macOS (Intel driver bug)

[m-decoster]

Godot version

v4.1.1.stable.official [bd6af8e]

System information

macOS Big Sur, Macbook Pro Mid 2014 (Intel Iris Pro 1536 MB)

Issue description

Baking lightmap data results in a completely black scene filled with black lightmap probes.

The directional light's bake mode is set to static and all meshes in the scene have UV2 (confirmed visually with "View UV2").

Steps to reproduce

1. Create a new scene with a Node3D.
2. Add some MeshInstances with primitive meshes.
3. For every mesh, click "Add UV2".
4. Add a DirectionalLight3D to the scene and set its Bake Mode to "Static".
5. Add a LightmapGI node to the scene and click "Bake Lightmaps".

Minimal reproduction project

Archive.zip

[clayjohn]

Here is the result from opening your test scene and clicking "bake lightmaps" using PopOS and intel integrated graphics

Accordingly, I'm guessing that this is a macOS-only issue

[mibu-games]

I have the same on Linux with Intel UHD Graphics 620.
It doesn't work on most scenes and drops plenty of errors like these:

drivers/vulkan/vulkan_context.cpp:2796 - Condition "err" is true.
drivers/vulkan/vulkan_context.cpp:2803 - Condition "!ld->waiting" is true.
Vulkan: Device lost!

[Calinou]

I can't reproduce this on 4.3.dev 9b94c80 (Linux, GeForce RTX 4090 with NVIDIA 550.54.14).

[mibu-games]

On 4.3.dev4 I get black lightmap and hundreds of errors:

drivers/vulkan/rendering_device_driver_vulkan.cpp:2014 - Condition "err != VK_SUCCESS" is true. Returning: FAILED

[passivestar]

Can't reproduce

Godot v4.2.1.stable - macOS 14.4.0 - Vulkan (Forward+) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

[aprats1]

I have the same problem with Ubuntu 24.04 and Godot version 4.2.2 on a laptop with a fairly basic, not very powerful graphics card, Nvidia GeForce MX250. Theoretically, my graphics card is compatible with Vulkan...

I don't know, let's see if we can solve this.

[mibu-games]

I noticed that it works only when resulting textures are very tiny, up to 256x256 - Fedora 40, Intel UHD Graphics 620, 24GB RAM.

[unaiLarra]

Same error here with Intel UHD Graphics 620 graphics, 16GB running Pop!_Os and godot 4.2.2

[Calinou]

@mibu-games @unaiLarra This is an unrelated issue (OP is on macOS but you're on Linux), so please open a separate issue for that instead. Also, did you reproduce this issue with the minimal reproduction project uploaded by OP? If not, please upload your own MRP where you reproduced the issue.