VFX Graph not visible on Android and iOS after upgrading from 2022.3.50 to 6000.2

[5yF0Rc3]

Hi, we are developing a game for Android and iOS using VFX Graph. After upgrading our project from 2022.3.50f to 6000.2.6f2, all VFX Graph effects stopped rendering on the Devices. No errors or warnings are shown.

My test device is a Pixel 6 and IPhone 17.
I reproduced the issue in a new project and found the following:

• Created an empty project in 2022.3, added a simple standard VFX particle effect, built for Android, and logged the following:

Debug.LogWarning($"{SystemInfo.supportsComputeShaders} | {SystemInfo.maxComputeBufferInputsVertex}");
Debug.LogWarning($"Using {SystemInfo.graphicsDeviceType}");

result:

True | 8388608
Vulkan

• Then I upgraded the same project to 6000.2, built again, and logged the same data.
  This time the result was:

True | 0
OpenGLES3

No particles are visible in this version.

I tried forcing Vulkan, but then the app does not start at all.
From my perspective, Vulkan does not seem to work correctly on Android in 6000.2.
Could that be the case? What can we do?

Relevant posts:
some older posts, with similar problems, but none of the solutions helped so far. The posts suggests that the Mali GPU seems to be a common problem, but those are 5 years old. Also, I find it strange, that the 22 Unity version worked but the 6.2 doesn’t.

VFX effect not showing on android

So, im making project using Unity 2019.2.18f1 , and have problem with VFX effects, in editor everything looks fine, effects are displayed without problem but in android build, they are not showing up.

VFX stop working when update 2021.3.16f1 to 2022 or 2023

The VFX was working perfectly on the mobile devices we were using for testing until we tried to change the project to 2022. Then on two of the devices (curiously the most powerful, modern and GLES3.2 supported) it stopped working, except for a couple of VFX that are completely broken now. The only thing I get from the console is: Shader warning in ‘[FX_explosion] [sockwave] Update Particle’: Buffer count exceeding default GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS. Shader might not work on all hw. C…

.discussions.unity.com/t/vfx-graph-started-not-rendering-on-android/795349

[FredMoreau]

Hi,

@5yF0Rc3

No particles are visible in this version.

Indeed, VFX Graph is Vulkan Only, and not officially supported on mobile at the moment.

@5yF0Rc3

I tried forcing Vulkan, but then the app does not start at all.

Can you please log this as a bug with as much details as possible?

Thanks

[5yF0Rc3]

Thanks. Now that I know it’s truly a Vulkan issue, I found this thread with the solution:

Why is Vulkan disabled for the Pixel 6 family of handsets by default?

We have seen a lot of driver issues on the Pixel 6 devices with Vulkan. So we decided to not run Vulkan on it by default unless the developer opts into it by adding it to the allow list. The idea was that devs realize that it is a problem device and make sure to test it out before enabling Vulkan on it.

The Google Pixel 6 is the only device on the list. However, my setting ‘Vulkan device filter Asset’ was set to ‘None’, yet it still blocked my Pixel. After adding it to the allow list, everything works again.
Currently I look into if this also solves the problem with iOS devices.

[5yF0Rc3]

The iOS Problem is also solved. I had to resave all VFX assets again (found in another thread). Just a very unlucky correlation.