---- beacause my English is not very good if there is anything impolite in my sentences i apologize first Slimeqc ---- Does anybody know where could I find something about architecture of particle system, something about modeling, simulation , and rendering. Are there some papers about this? my e-mail is saber6996@yahoo.com.tw please reply to my e-mail box if you are convenient. thanks a lot!

There is a tutorial Here