Re answer my question.
Here is a thread very important thread located on cgtalk.http://forums.cgsociety.org/showthread.php?f=87&t=804892&page=1&pp=15
with 1190 reply and 157472 visits. So is a litteraly problematic for all of us want to be render a huge forest inside maya.
Is there, at an year of your reply, any chance to see some code string ported into maya?