Tunnel renders above buildings

[dktue]

Expected behavior

Tunnel renders under buildings

Actual behavior

Tunnel renders above buildings

Links and screenshots illustrating the problem

https://www.openstreetmap.org/#map=19/48.51839/9.04460

[matthijsmelissen]

Tunnel renders under buildings

Is that really the expected behaviour? In that case, small tunnels under big buildings would be invisible.

See for example also #529.

[matthijsmelissen]

See https://www.openstreetmap.org/#map=17/49.61100/6.13263 for a case where it is probably desirable that the tunnel is rendered on top of the buildings.

[dktue]

Good point @matthijsmelissen -- I'm looking forward to the discussion that might take place here! :-)

[matkoniecz]

This is a complicated decision and it was considered desirable to render tunnels over ground features - see for example #3265 #3025 #1609 #623 #1911 and my own report in #250 :)

I will close it as a duplicate for now. Proposal to change it should consider reasons why it is considered preferable (for start - building passages would be invisible with tunnels rendered under buildings).