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Freezeing keyed particle ststem
Open, Waiting for Developer to ReproducePublic


System Information
Operating system:
Graphics card:

Blender Version
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (2.7b)

Short description of error
Particles that are supposed to follow a mesh as setup using keyed settings, do not render correctly, sometimes the particles dont render in full and sometimes the particles freeze in place while the mesh they are supposed to follow keeps on moving.
The render window shows the particles in correct place, but the render will render the particles in the last non glitched position.
Changing the settings such as lifetime, amount etc will not do anything to change what is happening in engine.

Exact steps for others to reproduce the error
2.7 works just fine, porting projects to 2.8 produces glitched results. simply render at frame 550 and beyond and you will see that what is going on in the render window doesnt happen in render.
Based on the default startup or an attached .blend file (as simple as possible).



Event Timeline

Sebastian Parborg (zeddb) lowered the priority of this task from Needs Triage by Developer to Needs Information from User.Jun 11 2019, 4:45 PM

Is this still an issue with the latest beta? I tried rendering a few frames and the particle positions doesn't seem to be wrong.

I have since had to do another scene in the same environment using the particles, When I try and render a movie, some frames skip out on some of the particles, some skip out on all the particles altogether leading to a very flickery special effect, to fix this I have to re render the scene without the backdrop and just the particles on their own with the render set to 1280 by 720 (Before I was using 1920 by 1080) it increases the chances of a successful render (lowering the output resolution improves its chances 4k is bad, 8k particles don’t even work at all 90 percent of the time, 720p they work 90 percent of the time) So I rerender the particles in 720p then composite them together for a less... flickery special effect.

Sebastian Parborg (zeddb) raised the priority of this task from Needs Information from User to Waiting for Developer to Reproduce.Jun 12 2019, 3:03 PM