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With PLA-enabled objects, RealFlow | Cinema 4D has to recalculate the internal collision geometry with every single simulation step. Especially with small → "Cell Size" values PLA might be a simulation's bottleneck.

I can see particles going through my collision object. What

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's happening here?

With fast moving particles and/or a very small number of simulation steps per frame it might happen that a particle in a starting position goes to a final position in the next simulation step that is at the other side of the collision geometry:

  • To avoid this, activate the "Collider" tag's → "Continuous Collision Detection". 
  • By default the auto mode is enabled, and RealFlow | Cinema 4D will decide automatically, if the collision object requires "Continuous Collision Detection". 
  • Collision detection is computationally more intensive, and simulation simulations take longer.
  • In some cases the automatic detection fails, and you have to disable enable "Continuous Collision Detection" manually.

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When the body's polygons are very small it might happen that you will not get any particle emission. To fix this, increase the "Fluid" container's → s "Resolution" parameter to create more particles. You may need high settings (100, 200 or even more).

Are RealFlow | Cinema 4D particles able to influence Cinema 4D dynamic bodies (rigid and soft bodies, cloth)?

No, RealFlow | Cinema 4D do does not change the motion or shape of Cinema 4D dynamic bodies, but they are able to interact with them in terms of collisioncollide.