I am working on 3D map of the city. All buildings are visualized from polygons. My task is to connect polygons into buildings. I tried it with the "Merge" tool, but i have big issues with it.
Firstly,as you can see on the photo, after merging polygons, the whole shape is distorted or even completly disapears.
Secondly, as i try to merge for example wall with roof, error "cannot merge overlaping polygons with differing z values.
I will be very grateful for your time and advices
Best regards

