project finished and Problem solved with meshed/vrayproxy version,
for 1 image DR is faster than backburner.
i had some 3dsmax bug in beginning of the project
i solved this with this -->
loading a save selected max file with 1 chamferbox and your 16gb ram are full .....
after running the script in my Project scene i had 2gb in ram, savefile was going down from 1gb to 78mb
but this i got fixxed with this.
perhaps something was wrong with this scene or the scene and vray DR
i tried to reproduce everything with a new scene and now everything is working
i know my hedge is a huge model , but it`s a very beautiful i think *gg*.
Thanks for your help