Volumetric fog causes dropping FPS and input lag

[UAVXP]

Describe the bug

Enabled volumetric fog is dropping down FPS and introduces an input lag of about 0.5 seconds.

GPU: AMD Radeon R7 360 2GB GPU GPU driver version: 21.09.13.02-220802a-382934C-RadeonSoftware GPU software version: 2022.0802.1058.19750 Vulkan Driver version: 2.0.179 Vulkan API version: 1.2.170

Game version: 5/22/2024 7f32df9, Steam build 14456538 Graphics settings: 1280x720 windowed, VSync off, 2xAA, 8x anisotropic

To Reproduce

1. Open s&box
2. Go to Material Testing map
3. Experience 12-20 FPS and a huge input lag everywhere on the map

Expected behavior

I'm expecting a >60 FPS and no input lag on aforementioned map

Media/Files

Additional context

It doesn't depend on a resolution, vsync, antialiasing or texture filtering settings.

I've found a console variable named r_enable_volume_fog, set it to 0 - and a relief! - my FPS is higher than 60 and no input lag:

[sampavlovic]

That's a 10 year old GPU, volume fog needs a major rework though

[UAVXP]

Still appreciating that this GPU is still supported in s&box tbh, thank you

[pfatoba]

same that fixed mine