Postal 2: Spectating in 1st Person
Before 1409X was released to the public, the Mutator allowed freelook pivoting when tracking a player in spectator mode via 1st person view. When 1409X was finally released, this feature went away.
This is just a video I created a while back to demonstrate that it is possible to track the player's field of view. The only things missing, of course, is the HUD and weapon display. The tracking of the free looking, however, is sluggish even when spectating in a LAN server.
I originally intended for this to be a split screen where it shows the actual player playing and the spectator view side by side. But, due to hard drive space limitations and the extreme work involved in getting this done in only VirtualDub, I shelved the project.