Inner wall should have the parameter -outline in. It means „outline“ or bedrock is inside area bounded by line „wall“. 

Martin

17. 4. 2021 v 15:22, ⁨עמרי גסטר⁩ <⁨omrigas@gmail.com⁩>:

In the first image the inner wall is defined "out" and the yellow tick facing outward and this works fine.