hi
i got a level whit some corridors and rooms lot of models and stuff but when i enter a maintance romm i built whit models of iron walkways and some cisterns whit shadows enabled the engine comes too a virtual stand still.
since i can play games like Quake4 @ 1280x1024 with all fx whit no lag i would like too know what i am doing wrong (lots of shadows, i know that but should still work) and let me know.

i have the following system.
Celeron d 365 3.33ghz @ 4.15ghz
1024 dram2 800mhz
Geforce 7600gs 256mb