Flickering in `anti_aliasing` example with FXAA enabled.

[Elabajaba]

Bevy version and features

Bevy main cf35f37

Relevant system information

`AdapterInfo { name: "AMD Radeon RX 9070 XT", vendor: 4098, device: 30032, device_type: DiscreteGpu, device_pci_bus_id: "", driver: "AMD proprietary driver", driver_info: "26.2.1 (LLPC)", backend: Vulkan, subgroup_min_size: 32, subgroup_max_size: 64, transient_saves_memory: false }`

What you did

Run the anti_aliasing example and toggle the different AA types.

What went wrong

Flickering with FXAA

2026-02-14.18-08-54.mp4

[alice-i-cecile]

For whoever wants to take a look at this, the next step is to bisect this to find the cause.

[beicause]

Is this related to #22863 (comment), though I didn't encounter flickering

[jatimix]

I've run the Bisect, and I can confirm that #22766 introduced this flickering (related: #22863)

toggling any anti alias, then switching to FXAA trigger the flickering

[alice-i-cecile]

cc @kristoff3r @atlv24. I bet we screwed up system ordering.

[kristoff3r]

This problem reproduces very poorly on my machine, I only got very faint flickering and with a long delay between the flickers. I believe the problem is caused by SMAA specifically still running after the Smaa component is removed, and I have a PR to fix that here: #22985. Can someone who can reproduce better check if this solves the problem?

If it doesn't then it would be very helpful to know the smallest amount of switching between AA modes in the example that can trigger the issue, e.g. SMAA -> MSAA -> FXAA.