Can't be done...
In reality this sudden, lonely and unnerving "effect" that the pilots in your readings experienced was really nothing more than a misperception borne out of the limitations of their own eyesight. Naturally, the human eye is limited in the distances it can see and the amount of clutter it can deal with while moving through space. So, in a furball that gets dispersed and scattered by great distances, there's often somebody within just a few miles, sometimes higher up or much lower, that a pilot just can't see despite his frantic swivel-necking attempts. Sometimes nearby planes get visually "lost" against ground clutter or in clouds or in the pilot's cockpit blind spots. Its a very vulnerable time for a combat pilot in harm's way, because it would be easy to get lulled into lazy flying just looking around for friendlies and not flying aggressively defense against the one that can possibly come out of "nowhere" and shoot the lonely guy's ass off. This is reality flying that can only be simulated in a scripted virtual combat program if the designers do so. This was not done for CFS2. Any plane - friend or foe - within 10 miles of you will be visible no matter what. You can even turn off the target radar, but you'll still be able to "see" your nearest neighbors, even at 10 miles.