Please help - Walls disappear and roofs are looking funny

What am I doing wrong with 3d buildings? The walls disappear under roofs, building parts above ground level are not rendered and roofs are just looking weird.

I think I have followed the directions for simple 3d buildings in the wiki - but apparently not good enough.

Simple building with disaapearing walls: http://demo.f4map.com/#lat=55.3269921&lon=8.7616373&zoom=21&camera.theta=46.196&camera.phi=-125.191

Complex building with a lot of issues: Disappearing walls, roofs pointing in the wrong direction, above-ground building parts not rendering etc.: http://demo.f4map.com/#lat=55.3953466&lon=10.3889803&zoom=20&camera.theta=52.448&camera.phi=-124.045

Here the onion domes are not rendered: http://demo.f4map.com/#lat=55.6853143&lon=12.5907691&zoom=21&camera.theta=49.347&camera.phi=21.486

I would be really happy if someone could help.

Tårnborg looks good to me, can you provide a screenshot ?

cathedral : i’ll need to investigate. but you need to specify skillion direction. my guess is using building:part roof disables wall rendering, you may want to try with building:part yes (or add another part)

onions : you specified building levels, but not roof levels (or height)