VoxelGI albedo color is white with custom shaders

[Muini]

Godot version

4.0.3

System information

MacOS - 4.0.3 - Forward+ - Vulkan

Issue description

On a more complex scene

VoxelGI does not take custom shader albedo into account, resulting in white voxels.

It's possible to fix it by setting the mesh as Dynamic, but I don't think it's a good solution.

Steps to reproduce

• Add a MeshInstance3D with a Sphere geometry, and a custom shader material
• Set the albedo of the custom shader to red
• Add VoxelGI to the scene
• Bake VoxelGI
• Either use a reflective material, or use debug view VoxelGI albedo

Minimal reproduction project

VoxelGI bug.zip

[viksl]

Can confirm this on Windows 10, godot 4.1 RC3, nvidia GTX 1660Ti.

In the picture below it's three spheres, starting from left:

1. StandardMaterial3D
2. ShaderMaterial, visibility set to Dynamic
3. ShaderMaterial, visibility set to Static

[Calinou]

Thanks for the report! Consolidating in #64124.