Quote Originally Posted by eLhabib View Post
The game can only record the input of your controller (and of the AI), but the effect in-game runs through the physics engine. Now the problem is that you can't rewind the effect of the physics engine - that's why you can't rewind Halo's saved films. But even for an un-rewindable replay, the physics engine doesn't act exactly the same way every time (like in real life, you just cannot exactly replicate a situation) - that's why in a game with more complicated physics it can mess up the whole replay.
This makes sense to me.

But for Time Trials, why not just track the location of the ship along with other relevant data (airbrake uses, barrel rolls, pitch)? This is already done for ghosts-- why not lock a camera behind an improved ghost?

Anyway, that raises another question-- what is the quality of the ghosts for WOHD? Do they show barrel rolls, for example?