Disabling msaa_writeback breaks multi-camera UI

paul-hansen commented 3 months ago

Bevy version

0.14

Relevant system information

cargo 1.79.0 (ffa9cf99a 2024-06-03) rustc 1.79.0 (129f3b996 2024-06-10) Arch Linux (EndeavorOS), KDE, (tested both Wayland and X11) Firefox 127.0.2 & Chrome 126.0.6478.126 Nvidia 3080 Driver version 555.58.02

AdapterInfo { name: "NVIDIA GeForce GTX 980, or similar", vendor: 4318, device: 0, device_type: Other, driver: "WebGL", driver_info: "2.0", backend: Gl }

What you did

I disabled msaa_writeback on my splitscreen game.

What went wrong

what were you expecting? I was expecting it to stop writing the effects of msaa over top of other cameras.
what actually happened? The UI stopped working on all but one camera.

Additional information

You can replicate this easily by adding msaa_writeback: false to the Camera component on the offical split_screen.rs example.

paul-hansen commented 3 months ago

I patching bevy with this draft PR and it completely fixed this issue: https://github.com/bevyengine/bevy/pull/14287

paul-hansen commented 3 months ago

Closing as completed in https://github.com/bevyengine/bevy/pull/14287

bevyengine / bevy