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Under Consideration for 2022.3.X, 6000.0.X

Votes

0

Found in

2022.3.37f1

6000.0.10f1

Issue ID

UUM-75401

Regression

Yes

[Metal] Random Number Operator in a child System only has set limited seeds for particle spawning in a visual effect when entering the Play Mode

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How to reproduce:
1. Open the “VFXReproRandom“ project
2. Open the “Test“ scene
3. Enter the Play Mode
4. Observe the Game view

Expected result: Particles are being spawned randomly all over
Actual result: Particles are being spawned only in a few spots

Reproducible with: 2022.2.9f1, 2022.3.37f1, 6000.0.10f1
Not reproducible with: 2021.3.40f1, 2022.2.8f1

Reproducible on:
* macOS 12.7.4 (M1)
* MacBook Air M2, 2022, 16GB RAM, macOS 14.5, Unity 6000.0.12f1
* MacBook Pro M2 Max, 2023, 64GB RAM, macOS 14.5, Unity 6000.0.12f1

Not reproducible on:
* macOS 14.5 (Intel, M1),
* Windows 10 Pro (22H2)
* macOS Sonoma 14.4.1 M2 Ultra
* macOS Sonoma 14.3.1 M1 Max
* macOS M1 Max Sonoma 14.5
* macOS M1 Max Ventura 13.6.7

Notes:
- Only reproducible on Silicon
- Not reproducible in the Player
- Not reproducible in the Edit Mode
- {color:#00875a}Workaround: If you navigate to the Visual Effect Graph window (for the “VFX“ visual effect), open the VFX Control panel during the Play Mode, then set the Debug mode to Efficiency or Alive the issue does not reproduce anymore{color}

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