Screen-space distortion
We can now apply distortion effects to anything; in this screenshot I applied a basic refraction shader to the player model! Screen-space distortion is much faster than cube map distortion, because we do not have to render the scene extra times.
This effect will be used for heat haze, water refraction, fire distortion, and so on.

Predator Turner?
It looks to me far more like the Invisiblity effect in Halo. In fact it looks exactly like it. That is SO awesome David, you rock! I know there won’t be invisible bunnies running about, but the effect is cool all the same.
You mean there will NOT be invisible rabbits? Or will that be a cheat in the debug mode?