When comparing the SSAA version (Screenshot attached) with the noSSAA version (screenshot further above), one can clearly notice an improvement. So maybe it is just a wrong expectation from my side: The Moire effect is just reduced with the new textures, but not eliminated.
That's just subjective. We are seeing a borderline case here, which is at night with landing lights. I think the SSAA version looks just fine in SSAA but, obviously, nothing is preventing you to use the MSAA version even with SSAA. However, my screenshot of the MSAA texture is very different than YOUR screenshot with MSAA textures so, clearly, there must be some other issue at play, assuming you copied the correct files, which I don't have any reasons to doubt.
Reducing normal maps even more, while it might improve a bit ( it's already good to me ) at night, will make the scenery totally flat at day, like a freeware or default scenery.
And as already explained here, switching textures dynamically would have an fps cost, since we would have to attach a LUA script to all ground materials, and this has a cost (every line of every LUA script is evaluated at each frame, this has been confirmed by LM), for everybody, even those that CAN use SSAA or are not worried about the minor shimerring at night, especially if they don't tweak their shaders.
However, I do not see this effect with other Airport Addons.
That's just because they were probably made for FSX, converted to P3D or, even if they were made for P3D, they were made for the legacy shaders and not really thought as PBR, so they never bother to create normal maps to begin with. PBR simply cannot work without normal maps, since it affects everything. True PBR *requires* the proper antialiasing modes, like SSAA or Temporal Antialiasing, otherwise you WILL see moire effects and, as explained so many times already, if can affect each and every game out there, even those using more modern gaming engines, if the correct antialiasing is not set.
There are some rumours REX Environment force does something with shaders. Anyway, just make sure, I started P3D without REX and cleared the shader cache before, so it should not have an influence.
That's an assumption.
If you only removed the shader cache, the shaders would be only recompiled from their sources in the Prepar3d\ShaderHLSL folder. If THIS folder contains altered shaders, you won't see any difference, unless "without REX" means you ran whatever procedure REX has in place ( assuming it has one ), to RESTORE the default shader source files. Only after you restore the original shaders folder, then can be regenerated as default, when their binary cache in the %LOCALAPPDATA% folder is removed.
