http://www.openvdb.org/
HI I think this C++ library can be interesting for people did a 3d system particles... I don't know if it's in real time or it's under some render engine... But really it's interesting look how dreamworks works behind the Scenes...
I have to take a look... I think it's a good point for make a complex particle System in GLBasic, in Real time?¿, I'm not sure...