RedShift ignores particles based objects in render sequence

[resort-sand]

In this scene, I am creating petals using emitters following and colliding with some objects, until suddenly, a week ago, I noticed that my render using redshift, ignores completely the main particles emitter randomly (example :frame 3 in my scene), even if:

1- it is cached
2-it is seen in the viewport
2- it is renderable using Redshift IPR but not renderable using Picture Viewer nor as a saved picture
3-It is renderable using standard and physical renderer

When I bake the mograph that uses the particle group to Alembic, it works better but I have some petals exploded into small pieces like the picture shown (example: frame 4 in my scene)

I changed the scene, debugged on and off, motion blur, bokeh, changing particles objects inside mograph, starting a new scene using the same setup...etc.

Help is appreciated

https://we.tl/t-hAMa81w1CN

[Dr. Sassi]

Hi resort-sand,

Thanks for using Wetransfer.

I checked the file; the abc file was not part of the package. Some images were not part of the download.

I cached it new as I saw that you had set the time to "F =-150". I increased the project time first to 0-300 (250 would be fine, but why not have some wiggle room).

Then I set the time offset as well to -150

After setting the project time back to 0-100.

It rendered in the RS but not in the Picture Viewer. So I added a Matrix between the particle Group and the Cloner.

https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2024_PROJECTS_DRS/20240804_CV4_2024_drs_24_RSpa_01.zip

I checked and all renders fine here both render options (RS and PV).

Is this working for you? Missing your abc-file, introduced some uncertainty here.

All the best

[resort-sand]

Thanks Dr. The alembic files were not very important to reproduce the bug, actually I am testing it now by putting a scatter object between the Particle Group and the Mograph object and the early tests show no render bugs.
There is always a scatter object that solves an issue inside c4d
I appreciate once again your quick solution, even on a Sunday

Have a great day

[Dr. Sassi]

Have a great Sunday as well, resort-sand.

Thank you very much for your feedback.

My best wishes for your project.