Vulkan: SSIL causes partial viewport flashing when resizing the window

[Calinou]

Godot version

4.0.dev (b6b81e8)

System information

Fedora 34, GeForce GTX 1080 (NVIDIA 495.46)

Issue description

SSIL cause partial viewport flashing when resizing the window. This flashing does not occur if SSIL is disabled. This is something I noticed while working on a minimal reproduction project for #56723.

Epilepsy warning: video below contains some flashing when the window is resized.

ssil_not_rendered_until_redraw.mp4

Steps to reproduce

• Add some MeshInstance3Ds and a DirectionalLight3D so you can see light bounce around once SSIL is enabled.
• Add a WorldEnvironment node with a new Environment resource.
• Enable SSIL in the Environment resource.
• Resize the editor window. Observe that the 3D viewport will occasionally flash in the bottom/right corners when the rendering buffers are reallocated (as a result of the resolution change).

Minimal reproduction project

test_ssil_3.zip

[clayjohn]

I think this should have been fixed by Bastiaan's recent fixes. Can you confirm?

[Calinou]

I can still reproduce this on 4.0.rc 7e79aea and 4.0.rc e930c8d (which is roughly 4.0.rc4):

simplescreenrecorder-2023-02-23_23.43.34.mp4

[BastiaanOlij]

I'm going to have another look at this as I had this fixed at some point