I've seen thread few years ago with same question and the answer was - it is not possible. I want to ask is it still not possible now?
What I want to achieve is shown on screenshot: https://imgur.com/a/qtjCG
I want blue line to be shown always and white lines to be shown only if it above ground.
Do you know the way I can achieve it?
Or may be I can contribute to the terrain data with GPS data that 100% is above ground?