From day 0, I’ve this exact same question: why planes fade out when too close (with certain planes few meters only, with other - not necessarely bigger planes - 20m or more) ?!
This definetely cuts out any chance to do close formation flying and it seems to me like nonsense too.
I’ve of course tried to set damage/crash to OFF, AI Off, multiplayer set to Group Only…but no changings at all.
Any suggestions, or methods or mods to remove and forget this ridicolous feature?