I still see a short white flash (1 frame?). Definitely shorter than without the code. I'm guessing it's probably because render hasn't run once yet. Might be better to use a run criteria to run only the second time the system is called?

Yeah, it might be better to do it after Startup. Let me try that.

I've tried putting it in PostStartup, an Update system that waits for 5 seconds and spawning a camera but for all of them I still get a 1 frame flash. I'm not entirely sure if that's something that can be fixed user side or even in bevy. Personally, I still prefer this over the current status

looking at this issue looks like it might not be fixable vulkano-rs/vulkano#2263.

Looking on some of the applications on my windows machine I notice a white flash on some when starting up (ldtk, firefox), but others seem to avoid it somehow (all the built in ones at least). So there must be some way to avoid it, but probably not worth worrying about for now.

I don't think this is worth a dedicated example. Could you merge it with example window_settings?

I did it that way because I saw multiple people asking for the feature, but also I didn't realize the window_settings example was a thing so I'll merge them.

Could you merge it with example window_settings?

Done.

It looks like your PR is a breaking change, but you didn't provide a migration guide.

Could you add some context on what users should update when this change get released in a new version of Bevy?
It will be used to help writing the migration guide for the version. Putting it after a ## Migration Guide will help it get automatically picked up by our tooling.

@Selene-Amanita why do you consider this breaking? The default behaviour is still the same and it's only adding a new property

Example alien_cake_addict failed to run, please try running it locally and check the result.

@Selene-Amanita why do you consider this breaking? The default behaviour is still the same and it's only adding a new property

Well it's technically a change in API and also technically someone that doesn't use the struct update syntax would need to add the field, but yeah realistically it's a very minor change and probably doesn't need a Migration guide or anything.I forgot that the bot asked for it I didn't want to be passive aggressive ^^'

Oh no, don't worry I didn't interpret it that way, I just didn't understand what was breaking. I guess adding a new public field could indeed break a build so I'll add a migration guide. Better safe than sorry.

Example alien_cake_addict failed to run, please try running it locally and check the result.

could you revert your changes on the root Cargo.toml file? I think it's better to not put unrelated formatting in a PR

Done. Sorry, I thought I had already removed those changes😅. I've disabled toml formatting for bevy's repo so hopefully this doesn't happen again.