Compute shader texture flickering squares | Bevy | Page 1

small storm Jan 27, 2026, 7:52 AM

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I've got a project (bug repo: [DELETED]) based on an old version of the game of life compute shader example. I was having "flickering" issues with my texture rendered to a sprite and I've tried lots of debugging but I can't fix it. I've deleted most of the code for the bug repo above which is now simply writing pink to the texture.

I'm a rendering/shader noob so it's hopefully something simple or a general misunderstanding from my end.

I've tried multiple textures (swapping out the binding layout each frame, similar to the GoL compute example). I've also played with swapping the texture in FixedUpdate and lots of similar variations. Initially I thought the swapping was causing the issue!

Thanks in advance! MacOS if that helps.

small storm Jan 27, 2026, 10:58 AM

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Relevant files:

assets/shader.wgsl
src/game/level/shader.rs

sly bramble Jan 28, 2026, 12:41 PM

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This entrypoint does two textureStores, one black and one pink.

You've got black flickers on pink, so I would suspect there's a race condition in this logic somewhere. I'm not nearly enough of a WGSL wizard to tell you why offhand, though.

GitHub

bevy-compute-shader-render-issue/assets/shader.wgsl at main · twe4...

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small storm Jan 29, 2026, 1:22 AM

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Setting it to black exposes the issue, but I think the issue is there regardless. Not sure where to go from here :/

#Compute shader texture flickering squares