I'm Dexter Chow, a designer for GarageGames, developer of Torque engines and tools. I want to let everybody know, we just completed a beginning to end introductory tutorial for a 3D FPS level. The tutorial covers the basics in scripting, art integration, level design and game design. The free tutorial and free demo are available here:
For teachers and students, we've completed some free educational materials to assist teachers in curriculum development for introductory computer science, art, game design, portfolio and lab classes. My blog has all the details:
I'm a former game dev teacher and a non-technical game designer, so this project hits close to home. I see students struggle with 3D level development. I hope you enjoy it. Comments are welcome.