Support for sub-surface objects

Many airports have features that are below the surface but are still visible from above ground, such as tunnel entrances, etc. It would be nice for them to be included in the app. The specific feature that prompted me to make this post is the train in terminal 3 at ZBAA, which I have actually ridden on before IRL.

I can understand if this will take time to implement, because it requires overriding the terrain, but airports already do that over uneven terrain, so maybe it is straightforward.

well except for the train at PEK do you have any other examples?

Taxiway bridging over roads

That being said, there is also the question of what the scope of 3D objects are

ah that is a very nice example
you got my support fo rthis!

i don thave any votes left:(