It runs fine (80 FPS or so) when I turn off shadows, but is a dog (0.25 FPS) when I turn on shadows However, I can now actually run the code, so first thing to do tonight when I get home will be to try and play the game, or at least play with what is written right now. I want to, eventually, put some effort into the AI code (or, that is, maybe START the AI code). Given that, can anyone give me some history and / or information that might help me before I start to delve into the codebase? Are their specific files that I should look into to start with? Is there any base AI code at all?