Do you have problems with the incorrect “Multiplayers Traffic Models” ?
Here is a simple solution, with NO mods or add-ons needed 
It’s very easy to do it.
- first, i’m gona give you an example where to find the correct code line in the CFG file.
I have a freeware livery installed on my “community folder” and my path is :
D:\Games\MSFS2020\Community\Asobo_A320Neo_AirTransatWelcome\SimObjects\AirPlanes\Asobo_A320_NEO_ATWELCOME\aircraft.cfg
Now, as you can see, almost EVERY aircraft in this game has an “aircraft.cfg” file and they are all usually in the same path. Well, at least as far as it concerns aircraft that can be used by Players. Now every “aircraft.cfg” has a section from all the liveries that start like this: [FLTSIM.0] or if they have more liveries inside they have more like: [FLTSIM.1], [FLTSIM.2], [FLTSIM.3] … etc etc…
Now UNDER those lines, is a line that says: isAirTraffic = 0
When there is a 0, it means it is disabled and if you change it to 1 it gets enabled.
(In my picture you can see that i have changed it and THAT is the way to see the Livery inside of your simulator as traffic, IF another player is using it, at that time)
Please let me know if that helped you out.
I’m not 100% certain, but I think this line also allows that variation to be used as offline AI too.
On a side note, if you’re going to editing cfg files very much, let me suggest a free download called Notepad++. It’s a coder’s text editor that has a lot of useful features. You can even download a Compare plugin that will put two versions of a file side by side and highlight each difference.
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You can get finer details here:
SDK Notes
Note that some options need the selected aircraft to be optimised and lower detail than ones flown otherwise they’ll consume masses of resources.
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Exactly. This is only advisable when the external model has some LODs available. Otherwise your sim will run out of RAM very quickly.
When that setting is disabled, it’s disabled for a reason.
P.S.: Please use notepad for .cfg files. Wordpad with word-wrapping is just pure evil.
Yes guys, i agree with what you said about the “high textures memory” consumption.
I am VERY aware of this … so, i have a solution for THAT as well
Has anyone of you ever played “Skyrim”? 
(i guess you have)
IF yes, then you already know that Skyrim is using “DDS textures”.
Right ? 
There is a small free “MOD” for that available on the Nexus web site. And it is
called “Optimizer Textures Ordenador”
The sim already uses DDS textures with MIPs to reduce loading as aircraft are rendered farther into the distance. Any developer/painter that doesn’t use that feature needs to be beaten with their own mouse.
Well, i am usinng this “Optimizer Textures Ordenador” all the time,
because it can resize the high textures from 4k to 2k, or even some 8k textures
which are sometimes heavy on my pc. I don’t have the most powerful pc right now
so, yeah…
I mean i use the PMDG aircraft and i noticed that this aircraft is using a few 8k textures,
which is a “frame killer” to me. My pc has an old i5 processor.
I even converted some “airport textures” with this, and i gained like 5~7 frames more,
as i am flying with this aircraft to these airports, a very good resault for me.
And yes, you can even use “mipmaps” on the textures with it.
