Sure, one can try to do similar things with the Carrara particle system, but I found the "importing Blender fluids to Lightwave" idea interesting because it is a generic approach: create a changing geometry animation in one software (because you have better tools there for that particular job) and import it into your usual application, even if they don't talk natively at the animation level. The Lightwave users managed to do it with an .obj file sequence (and a few scripts), so the question still stands: can we do it with Carrara? E.g. is there a callback to some kind of plug-in during animation rendering where we could import the next frame geometry from an .obj file and replace the current one with the new one?