LightmapGI does not take into account the alpha channel of texture

[ONION-777]

Godot version

4.0.1 RC1

System information

Windows 10

Issue description

Without baked light

Baked Light

Steps to reproduce

Create a new MeshInstance3D, add a texture with an alpha channel to it, in the material settings, set the alpha scissors . Create LightmapGI and bake the light

Minimal reproduction project

N/A

[ONION-777]

@ONION-777 Please upload a minimal reproduction project to make this easier to troubleshoot.

Baking light.zip

[Calinou]

• Closing in favor of LightmapGI does not take transparency into account when baking shadows. #77590, which contains both Godot 3 and 4 MRPs for easier comparison.