Rendering Issue with Samsung Exynos CPU on Android 12

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1

Hello everyone!

After recieveing bugreports we’ve discovered that some of our games are not rendering at all on Samsung devices that are using a variant of the Exynos CPU.
We specifically tested on the Samsung Galaxy S10e and S10+ running Android 12. The problem could not be reproduced on the S10+ with Android 11.
This issue might be related to:

It can be reproduced when opening the sample project I referenced in the linked issue. When we ran the games with WebGL 1 we did not encounter the bug.

Link to the corresponding GitHub issue with an attached error log.

Best regards,
Christoph

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Update: @mvaligursky found out that enforcing this.useCpu inside the particleSystem emitter code fixes the problem.

Through this we discovered that setting the particle sort mode to something else than “PARTICLESORT_NONE” should result in the same thing, hence providing a quick fix for anyone experiencing this problem.

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Another update: We tested the release candidate of engine version 1.53.0 and can confirm that the added workaround fixes this problem as well.

Big thanks to @yaustar and the PlayCanvas team :heart:

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