• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
    • Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
    • Questions about aircraft design can be posted in the Aircraft design forum
    • Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
    • Questions about terrain design can be posted in the FS2020 terrain design forum.
    • Questions about SimConnect can be posted in the SimConnect forum.

    Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.

    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.

FSX Invisible or very small AI object

I want to use an invisible (or very small) AI object in order to obtain its ground elevation. Do you have any idea which AI object I can use for that? Or is there any AI object I can download for that? I want this object to be invisible as I just use it as bogus object (terrain probe) and it is NOT supposed to show up among the "real" AI traffic.

Related to:
Last edited:
In general yes (that means I would be willing to do that), but I have never created one. I was wondering what a minimal SimConnect.cfg sim.cfg would need to look like and whether I need any textures for that. Or is there a possibility to create one entry with 0 dimensions, speeds etc. and no textures?

I have no real idea what makes an AI a working one (so what the simulator checks if it adds it, or what is checked to pass any validation). May I will look for a tutorial and will create the most simple aircraft possible and try to reduce its size.

So if someone can give me a hint, cool!
Last edited:
Well, creating a simple object is very easy (using SDK and GMAX/3DSMAX) and you don't need textures - FlightSimX type material will take on a color and "shininess" of the base material.

You probably didn't mean to write SimConnect.cfg - it has absolutely nothing to do with what you're trying to do. However, sim.cfg does.

And, here is your hint ;): Take a look at Microsoft Flight Simulator X\SimObjects\Misc\Cargo_pod object. That's as simple as they get, model and sim.cfg wise. (MDL is only 27 kb, and sim.cfg has 3 entries...)
Another hint:
  • You can absolutely create an invisible object. For example, you can create an object with a single, tri-vertex poly with all 3 vertices being (0,0,0) (coinciding) which would make it a one-dimensional triangle, or co-linear (a two-dimensional triangle) . The MakeMDL will complain, but it will create an object.
  • You can also create an object with completely transparent material.