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Fixed in 2021.2.X
Votes
2
Found in
2020.2
2021.1
2021.1.0b1
2021.2
Issue ID
1304900
Regression
Yes
[Particle System][Vulkan][URP] Particles start freezing when Graphics Jobs and Mesh GPU Instancing are enabled on Vulkan
Reproduction steps:
1.Open the attached user's project "Particle System Graphics Jobs Bug.zip"
2.In the Project window under the "Assets/Scenes" folder open "New Scene.unity"
3.Switch the platform to Android
4.Make sure that Graphics Jobs option is enabled in Project Settings > Other Settings
5.In the Hierarchy window select "Particle System BUG" GameObject
6.In the Inspector window under the Renderer property, make sure that Mesh GPU Instancing is enabled
7.Build for Android
Expected result: Particles do not freeze when Graphics Jobs and Mesh GPU Instancing are enabled on Vulkan
Actual result: Particles start freezing when Graphics Jobs and Mesh GPU Instancing are enabled on Vulkan (See attached Results.mp4)
Reproduces on: URP 10.0.0-preview.26 (2020.2.0b6), URP 10.2.2 (2020.2.1f1), URP 11.0.0 (2021.1.0b3, 2021.2.0a2)
Does not reproduce on: LWRP 4.10.0 (2018.4.30f1), URP 7.5.2 (2019.4.18f1), URP 8.3.1, 9.0.0-preview.72 (2020.1.17f1)
Reproduces on these devices (Vulkan):
N/A, Samsung Galaxy S9 (SM-G960F), Android 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G76
VLNQA00024, Xiaomi Mi 5 (MI 5), Android 7.0, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530
Does not reproduce on these devices (OpenGLES 3 and OpenGLES 2):
N/A, Samsung Galaxy S9 (SM-G960F), Android 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G76
VLNQA00024, Xiaomi Mi 5 (MI 5), Android 7.0, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530
Notes:
-Issue does not reproduce if Graphics Jobs or Mesh GPU Instancing is disabled
-User was able to reproduce the issue on an iPhone 12
-On Windows Standalone the Particles appear for a split second and disappear on Vulkan, Directx11 is unaffected
-Issue is reproducible only with URP Particle shaders (Lit, Unlit and Simple Lit), if any other shader is used then the issue does not reproduce
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