i tryied all the render trials for scetch up..finally i am working with render[in]because in the duration i am working with my scene i have beside the preview of the rendered scene and i am finishing faster..but the same problem.when i have a scene of 100 and up MB stucks and tells error report.the program closes.

Hello guys..i am working from Greece and i have the same problem when i creating a scene with 3ds models which have many polygones.Scetch works so slowly and also i cannot render my scene.Why??
my pc details:intel core i7 CPU,ram 6GB,windows 7