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By Design
Votes
0
Found in
2022.3.15f1
2023.2.4f1
2023.3.0a18
6000.0.0b1
Issue ID
UUM-58583
Regression
Yes
Particle System emission delays between particle generations when playing the simulation
Reproduction steps:
1. Open the attached "2022particle.zip" project
2. Open the "239399_Scene" Scene
3. Click on the "Tamana" GameObject in the Hierarchy
4. Play the Particle Simulation
5. Observe the Scene view
Expected results: No visible timing gap between the disappearance of a particle and the generation of the next particle
Actual results: 1 frame gap appears between different particle generations
Reproducible with: 2022.1.0a10, 2022.3.15f, 2023.2.4f1, 2023.3.0a18
Not reproducible with: 2021.3.33f, 2022.1.0a9
Reproducible on: Windows 11, macOS 13.6.1
Not reproducible on: no other environment tested
Notes:
- Also reproducible in the Player
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Resolution Note:
We are acknowledging there is a change of behavior between 21.3 & 22.3 but the startLifetime == duration can already lead to an unexpected behavior.
In this case, the remainingLifetime has been fixed making it a bit lower than before, thus, it leads to one frame without any particle visible.
Some alternative fixes:
- Use a slightly bigger startLifetime
- Use a single infinite lifetime and duration particle
- Use a continuous burst and set max particles to 1, the bursts will fail until the alive particles dies
- Use Ring Buffer Mode, with Loop Until Replace