Thank you for your quick reply and trying help.
I've seen on other forums users have this same problem, so it is not just for me.
I willingly check these modified models
In which exactly distance disappear FAIB models in your simulator (If you know ?

My monitor resolution is 1920 x 1080 (Samsung SyncMaster 2243SN)
I use P3Dv3 now but earlier I used FSX and also visibility distance was about 2NM.

Is it possible to change distance in which models of AI traffic dissapear ?
If our airplaneplane is about 2NM away from FAIB models they vanish.
If I use other models (TFS) they dissapear in different distance (9NM) so the settings .cfg are correct.