P3D 4.3
I have customized three parking spots at airports I often fly into. In each instance, the only change was to specify that front and back loaders should be conveyor belts.
I should note that I have been using the Aerosoft CRJ for these tests, which has the cargo doors on the left side of the fuselage.
Prior to requesting boarding, one belt loader is positioned near the front of the aircraft, and one near the rear. There are also two waiting tugs with baggage carts attached, parked side-by-side on the right.
When I request boarding (or deboarding), the same thing happens every time. The forward belt loader drives directly to the aft loader, and “merges” with it, forming a doubled object. Then, the two combined loaders drive together behind the aircraft to the left side. At this point, they split apart again, and go to their respective cargo doors.
The two baggage trains do the same thing. They start driving, merge together, and travel behind the aircraft combined, then split apart and go to each of the two belt loaders.
There appears to be no collision detection between various GSX objects. I’ve seen the catering truck drive right through the fuel truck, and vice-versa.