Advanced Thing: 2 - Complex Behavior - object: Launch Complex - I hope the launch sequence mentioned in the behaviors box qualifies. Lifting, stacking, and launching the ship Advanced Thing: 4 - Particle system - object: Launch Booster - Smoke "particles" are created when the booster launches and then slowly disappear an amount of time After Advanced Thing: 17 - Dynamic Environment Map - object: Launch Booster - I'm only listing this because I spent time on it. I had a dynamic environment map on the booster which was really cool because you could see glimpses of the UFO and you could see the lifting arms lower, but it just was way too slow and made the frame rate suffer. If you cared, it's in the step world of the booster object, just commented out