Barely optimized.
When turning shaders on it drops over 200 frames. That's loving terrible optimization.
lets put it this way, the current version of torque is not meant to render shadows for multiple thousands of bricks in real time at all, plus why the forget would you need over 30-60 frames per second
hardly any game I know can render 250,000+ objects in real time
also your graphics card is at fault aswell