basic particles turn on and off randomly
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Thanks for the reply, resort-sand, and. the kind feedback!
They are all there, so far I can see, but perhaps too small? Please note that I set the Sampling (Render Settings> Redshift> Sampling for previews typically to 0.1, which is OK, but not production quality. Better is 0.01 or even 0.001, but the render time increases drastically.
Please investigate these suggestions, so we can find what is not working on your side. Please take one step at a time.
- Move the slider of the material to the right (delete the animation)
- Set up the Sphere size to 10cm, for example
- Cache the Particles with the option on the Folder: Particle group
Any insights that lead to solving this problem?
Happy New Year
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it was my bad, I forgot to exclude the particles group from rendering, so its alpha with a big radius was dominating the alpha channel so it gave me a false flag of the particles number
all is great now, will keep you posted
Have a great Sunday -
Thank you for your reply, resort-sand.
My best wishes for your project, and have a great Sunday as well!
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It seems it is getting me the caching issue using the new particles system, long story short, I am trying caching the scene here, bit it keeps crashing or freezing
I tried to debug it by recreating it, I think the moment where I ask for negative time values to get my preroll right this is where things get to be messed up
I am attaching the scene, but no need if I can find a proper and clean way to get like pre-roll of certain number of frames with caching
many thankshttps://we.tl/t-0lm0HGQ7Ep
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Hi resort-sand,
Thanks for the file.
Please run this version of your Project:
https://projectfiles.maxon.net/Cineversity_Forum_Support/2026_PROJECTS_DRS/20260112_CV4_2026_drs_26_PAcp_11.zipI used these steps:
The Cache Object to cache (not the Cache Scene)
The Remesh was converted into a polygon mesh (Object Manager>Objects> Modify> Current State To Object
As wild guess as the Clones were set to Multi-Instances.When this works for you, and all is as you need it, we can pinpoint more where it comes from and file a report.
All the best
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P.S.: This evening I explored this a little bit more.
Can you share if that happens as well, based on the scene you shared when you create just the cache for the particles - Cache Object?Thank you!
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Good morning Dr.
I made more debugging based on your recommendations
It seems that only the Mograph object being active is causing the crash, all the other elements: cache scene Vs object, baking geos were not the cause of the crash
I will keep digging
cheers -
Thank you very much, resort-sand.
Does it make a difference if you have it on an Instance Render Instance or a Multi-Instance?
So, caching while the Cloner is off works, and switching the Cloner on after caching shows problems or not?
Either way, that needs to go to Tech-support, so it can move along the fixing "pipeline".
https://www.maxon.net/en/support-center
If you have a minute, please use this URL. Thank you very much!Have a great morning as well. It is past midnight here, and I will call it a day soon.
Cheers
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Hello
Once the mograph is deactivated
the caching runs without no issue, upon finishing, I activated it 
all works normally, it didn't matter after if it is normal instances or multi instance
Thanks for being supportive
Best -
I noticed also the following,
-putting the mograph in Multi Instance with motion blur renders black frames, back to normal instance object and motion blur works
-in AOV with activating motion blur pass (with or without) motion blur activated renders black frames
At least this happens in my scene, maybe I am not aware of the motion blur limitations with particles or mograph based objects
Cheers -
Thank you very much, resort-sand, for the extra data.
I'm glad we got at least the crashes tamed via the workaround.
There is surely something not OK. I hope the tech support is getting to the bottom of it quickly.
The evaluation of a bug is done by the tech support, which is not my scope here.
All the best
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submitted as a bug
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Thank you so much, resort-sand.
Sorry that you had to experience a problem in the first place.
Fingers crossed that the switch on and off "dance" is soon not needed anymore.
My best wishes for your project!
