In the meantime I managed to have my particles system done (I need some particles to support deferred lighting which was a big part of the requirements), just need to know how/where to attach it to the ships.
I want flexible trails like in this video:
(better view afrom 3:40 to 4:xx)
So i think they use particles.
@jjagg I think i'll do it with the help of a custom processor
@KonajuGames I think it is done like this in Homeworld. I was thinking about something like this at first, and using some translation on the texture to give the impression on being pushed from the trusters. But it is too much rigid.
Another problem concerns particles, motherships can have a nice trail as they move slower than small ships. These ones need an emitter with a lot more particles, which in the end will kill the framerate. If i set the number of particles too low this will generate discontinuated trails.
In conclusion the number of particles is related to speed. I'll have to implement the two methods for each case.