Irrlicht Engine

Not in my opinion. In the first image you see a cloud of smoke generated 60 times per second (the car is quite fast at this point), but in the second image those clouds are distributed better, so that it doesn't look like that smoke is generated at fixed intervals. I guess I have to play around a little, e.g. generate more smoke, that should make it look better

Oh. From reading your post I assumed it should be continuous, not separate puffs.

I remember we had the same problem in H-Craft. Vehicles moved fast and particles were only emitted after object-updates instead of between the last position and current.

Didn't we add some code recently to distribute the particles? At least it would be possible to do so in the particle system.

Hm, you added some better random generator ~10 months ago. Not sure right now if that was for the same problem. Could be - I haven't used it recently.

No, the rng was not changed, I just exposed the interface and added another one which could be used instead.

OK, so I see this seams important to other people as well . But the main idea behind this advanced particle system was just to get better (de)serialization and cloning, which is the most important point for me (e.g. all ammo is in the scene as template and just copied once a missile (or bullet) is shot, including the explosion (which is activated when something is hit)).