The response is that this is an FSX limitation in displaying FS9 models with custom ground textures.
Which is of course the correct explanation: if the airport uses certain FS9 commands that are needed to create a *fully* custom runway, FS9 AI models will not display with Airplane Shadows off.
Yet in KORD and other airports by FSDT AI shows up with shadows without a problem. If it is possible in your other airports, can this not also be applied to all of them?
Because, not all airports use *fully* custom runways, some are using a hybrid default/custom method that is compatible with FS9 AI models
This leads me to the reason why I posted in the LAX thread, do I need to disable aircraft shadows in LAX to see the AI traffic as well?
I don't really know for sure:
using FS9 AI models in FSX is just wrong, so we don't test at all that configuration. At KLAX we took all the care possible to eliminate all the slow FS9 code, which is why it works so well considering its size and its complexity (way higher than KORD or JFK), if you are putting FS9 code back in by the means of AI, you are wasting all the advantages of KLAX being 100% native FSX.
In any case, that's what Trial versions are for: if you want to try a specific configuration before purchasing, you can.