OpenGL: Environment adjustments not implemented yet

[Calinou]

Related to #66455.

Godot version

4.0.beta (53d2a9a)

System information

Fedora 36, GeForce GTX 1080 (NVIDIA 515.65.01)

Issue description

Brightness, contrast, saturation sliders and the color correction texture have no effect on the displayed scene.

Both glow and adjustments are enabled on the example below.

OpenGL

Vulkan

Steps to reproduce

• Switch to the OpenGL driver in the Project Settings.
  • Make sure to start the editor with single-window mode enabled afterwards. This can be done by enabling Single Window Mode in the Editor Settings before changing the driver, or by opening the project in the editor directly with the --single-window command line argument.
• Add a WorldEnvironment node, a Camera3D node and a MeshInstance3D in front of the camera.
• Enable glow. Change brightness/contrast/saturation to make a visible difference in the scene.

Minimal reproduction project

test_opengl_glow_adjustments_editor.zip

[Calinou]

@naturally-intelligent Please don't bump issues without contributing significant new information. Use the 👍 reaction button on the first post instead.