the adequate distance to view the game...

[raaaid]

"trackIR 6dof works just fine "

thats the key it works wrong in every game

as soon as you change distance to the screen the fov GOT to be modified accordingly, im sure the greeks would have done it right since the start

couldnt be easier and less resource consuming than a simple trig calculation

edit:

check the effect i explain here:

the crosshair has a constant angualr size whatever the distance of the camera:

http://www.youtube.com/watch?v=NXsVg8F91t8