I already made the verification using 3DS but it was the same. Enabling a simobject to land on is not possible in MSFS. i.E. an aircraft carrier may only be used as a scenery object fixed o a defined position but it cannot move around. It works for the collision property itself but not for collision and road material at the same time. And you need the road material property to be able to i.e. land on it and not falling through it. They need to introduce a kind of second level of their ground property that's behind runways but without the animation of the ground deformation rising up to this level. The test_3.jpg shows the only way that I know how to get something to work 100% with all the sim features spawning on, landing on an not on ground level at present. All other kinds I testet on test.jpg are not having full features.