Lightmaps baked in GLES 3 appear as black in GLES2

[atirut-w]

Godot version

v3.5.stable.official [991bb6a]

System information

Fedora Linux 36 (Workstation Edition), GTX 1660

Issue description

Lightmaps baked in GLES 3 appears as black in GLES2. Changing settings such as disabling HDR does not fix the problem.

Interestingly, lightmaps baked in GLES 2 appears normally on GLES 3, although HDR lightmap looks darker than expected in GLES 2. This issue may also be related to #46442

GLES3:

GLES2:

Steps to reproduce

1. Bake any scene in GLES 3
2. Save the changes, switch to GLES 2 and restart.
3. Objects with lightmap appear as black.

Minimal reproduction project

Lightmap Problems.zip

[Calinou]

This is expected. To bake lightmaps that work with both GLES3 and GLES2, you need to disable atlases before baking lightmaps in GLES3.

Closing, as this is already documented on the Baked lightmaps page.