Particle advection doesn´t match sim, huge position offset

Technical
1

Hi

I´m advecting xparticles, but the velocity of the TFD simulation is affecting the particles much earlier than the actual simulation. And that produces a huge position offset.
I´ve tried scaling the scene, changing particle velocity scale, using 2nd order advection when caching TFD, offseting the simulation… Everything I could think of.

Any ideas what can that be? besides this being a bug?
Thanks!

TurbulenceFD_C4D_v1-0_1465
Cinema4D R23.110 (also happens in R21)
Xparticles Build 895

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image1164×695 123 KB

2

Apologies for the delay.

  1. Are there any other velocity modifiers affecting the particles? Without the TFD Volume they should not move at all.
  2. Is there a transform scaling the volume or particle point cloud?
    Otherwise, could you send or attach a test scene that allows me to reproduce the problem?
    Thank you.
3

Hi Jascha

Thank you for you reply. I managed to make the particles match the smoke entering a -1 in frame offset.
But here´s a file if you want to take a look.
advection_problem.c4d (216.8 KB)

Best

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