Wonder why this scene renders to the Viewport but not to the Picture Viewer... any help would be appreciated.
Thanks.
(Pyro/advect render settings still a mystery)
Pyro 57 circlec.c4d

Not sure if the docs need to be updated - R2025 currently says:
"To Cache your Emitter particles you can go to Simulate → Particles → Bake Particles."

but of course that does not apply to the new system, so when I want to advect Particles with Pyro Output and cache the scene, do I need to first enable "cache Mode" or do anything else for the Particles, as I tried using Cache Scene and the particles did not advect. Thanks for any info
(and maybe request an update to the online 2025 manual: https://help.maxon.net/c4d/2025/en-us/Default.htm#../Subsystems/Default/Content/html/Cinema+4D+Particles.html#Cinema4DParticles-CachingSimulations)

Thanks much. But how exactly do you enable an Attractor? Do you just add it to the scene and it is automagically enabled? There's no "Modifier" or Effector window to add it to. Does it just work by simply adding it to the scene? But then what if there were two sets of particles and you only wanted to impact one.
Simple answer needed: How to enable an Attractor?
thanks

no attraction.c4d

I'm not clear how to enable the Attractor in this scene - I want the particles starting point to move in the direction of the Attractor as it crosses the stage. I put is as a child of both the Particle Group nd the Emitter (the docs are not very clear on this point), but I can;t see that it is working - I tried raising the strength quite a bit, but there is no noticeable difference. If you remove the Pyro tag it's easier to see that the Attractor is not having an impact on the position of the particles. Thanks for any assistance,.

Thanks for the link. The woman who starts speaking after about 12 minutes of chit chat in this one https://www.youtube.com/watch?v=fLk2q7--hW0, is neatly unintelligible. Very bad audio issues. Wish I could understand her!
Thanks anyway - I've found a lot of tuts that are better produced and have good audio.
She's good: https://www.youtube.com/watch?v=2PKZE0c9p5U&t=776s

and so is https://www.youtube.com/watch?v=EjJDGlNR4SU who I now follow.

Just still some confusion on when I actually do need to render... wish the docs just laid it out!

The more tutorials, the merrier! Another tut I would request is a deep dive into when to use which of the Pyro Output Object Properties settings for exactly what type of operation (when rendering directly, when caching then rendering, etc.). Endlessly confusing, and I've read the docs many times. Definitely some other things come to mind as well...

I was really just wondering, in theory, what changes to what parameters would need to be recached to take effect (got a little more than I bargained for ;-)) I cached a scene containing pyro and particles and wanted to make some edits - the ones mentioned above - without having to recache the entire scene. Empirically, I couldn't tell if some of them were having any effect, hence my question. Thanks.

Just cached a 600-frame scene and would like to render it with some modifications. Can you tell me if these params can be edited before rendering, or will changes have no effect on the final render once cached?

1. Change W and H in the Render settings
2. Change Threshold in the RS Render settings
3. Enable 8-bit Dithering in the Render settings
4. Change substeps in the Simulation tab
5. Change lighting position/settings (add new lights?)
   Thanks very much for any info.

Ok, but this was not the file in question that I posted here: https://www.dropbox.com/scl/fi/jlrinp14ly8ydhums8lrc/erupt-1a.c4d?rlkey=xq6qnredyvwgymjf479jwlrz5&st=0nqx8eh9&dl=0
(I call it Erupt1a...) that produces the image below (which shows the good part, before everything blows up). So something got crossed in the conversations - just checked and the link from above is indeed Erupt...

https://www.dropbox.com/scl/fi/jlrinp14ly8ydhums8lrc/erupt-1a.c4d?rlkey=xq6qnredyvwgymjf479jwlrz5&st=0nqx8eh9&dl=0

Thanks very much for your note - lots to digest. At the moment, I'm going to focus on a deep dive into the scene, (extensively) adapted from an online tutorial, to see if I can't get those particles to stay put a while longer. Otherwise. I think the solution is post work.
Thanks again for sticking with this one.