For object too high, drop the model here, usually better to have center of model be towards the geometric middle, vs at feet, etc.
Viewing post in C3 3D Mesh, 3D Vertex Light, 3D Physics - SDK V2 comments
its on the middle, it disappears still when moving camera down
https://www.mediafire.com/file/xxc1scpr8xeucae/Airplane.zip/file