You see that that always pretty much exact half of my black crack is clipped in the mesh, always. On this mesh.
On the other mesh it works perfectly fine, always. Independent of my view, angle or location. So I have to assume that my code works fine and the problem is the mesh.
I could copy the working mesh, place it where the notworking mesh is and it would work fine. But I dont want to replace all meshes and even more I want to know whats happening here.
I created the meshes by using the box brush and then converted into meshes. All of them are created this way.
Thank you for every input!