I know I know, lots of topics. Sue me.
Anyway, more uses for particles! In nebula missions, would it be possible to have a certain particle spawn in a spherical shape around 40m out from all craft in the nebula, then head steadily towards the craft as it moves (or indeed doesnt). Lets take the example of a fighter.
It flies through the nebula and the particles spawn around it (sufficiently hidden at first by the nebula POFs). They head slowly towards the fighter (at all times) but when within 1m of the craft they have a life cycle of around 1 second left and stop moving towards the fighter. This way they:
A) Do not surround the fighter in a rather odd and alien manner. It's smoke/dust/etc, not an affectionate particle.
B) As the fighter moves, the particles appear to swirl around behind it, then disappear in the nebula (so to speak).
Overall the effect is of gas/particles/dust/whatever being displaced by the fighters movement and then settling again as they are no longer being displaced.
Obviously a suitable particle would have to be created, but I think it could be a pretty cool way to jazz up the nebulas some.