Particle Follow unreliable with regular particle's caches.

[rconover]

You can set everything (particles with follow) to work peachy.
But cache the result at it isn't correct. And therefore you cannot reliably render (batch) the result either.
Nparticles seems to be better-but its very rude re-designing otherwise working effects from scratch! :SMOR

Repro
1) Create basic fume with simple source-make it sim for 100 frames. Make sure velocity is exported.
2) Create a particle system (make sure the emitter is at a similar location to the FFX simple source.)
3) Attach the particle system to a FFX follow field and observe closely how it plays back.
4) Now do a Dynamics>Solver>Create Particle Disk Cache. You'll never have the same result.
I found you get different results depending if you cache from (time line) start frame, end frame or somewhere in the middle.

PP Sampling attributes seem to have no effect.

Uncached renders (of particle follows) with render batch (the only way to get a sequence) doesn't give you expected results (often no results). Don't be fooled by rendering from the UI. Render batch is what doesn't work.

This blocks using the two together.

Tested in 3.5.2 (installing 3.53 next week-hopefully)

[sitnisati]

Hello,

Thanks for bug reports. We are looking for solution.

Regards,
Kresimir Tkalcec

[rconover]

Thanks Kresimir
Note that I changed the description and title of my other submission for precision as to what the real issue was.

[malu05]

I have the same problem, now with version 3.5.5 in maya 2013. Has this bug ever been fixed?

My original post follows below:

"The particle cache in the solver tab, doesn't work.

I have a problem with caching my Particles in Maya, when they are using FumeFX for emission and FollowField.

Either it doesn't cache any particles (Files are 1 kb), or it only cache particles in a small area, based on the location of my particles on my current frame.

I am able to "scrub" through the timeline frame by frame, and it looks fine.
I can also render a single frame with particles, but it doesn't render the particles in a batch render. - I was thinking this is connected with the cache problem

This whole thing is a bit frustrating, so I was wondering if any of you have any experience with this type of behaviour."

[sitnisati]

Hello,

This issue is related to the issue: viewtopic.php?f=16&t=1593

We will try to fix this for the next FumeFX update.

Thank you.

Regards,
Kresimir Tkalcec