Hey guys ,

i have a problem with modeling a park. I use a jpeg as ground and placed 3D object trees on it, when i had about 100 trees, the render woked fine. then i placed about 500 trees and now the the render window is blank, only the enviroment is visible. Maybe there is something with my graphic card or open GL. i have no idea. thx for help

-Windows XP
-Sektchup 8 Pro
-Vray
-Radeon XSeries