Closed Solid splits

Dear All,
i have a closed solid in rhino that splits on the edges if i divide the mesh in zbrush.
I made it in rhino by joining surfaces. Is this a wrong way to construct solids?

Volumenkoerper_Problem_R.3dm (634.1 KB)

Have you considered using QuadRemesh Command?

Hi Arnold - if you mesh the object in Rhino using the Mesh command, you can Weld the resulting mesh at 180 degrees and then export that mesh.

-Pascal

Thank you bouth for the help. The welding does it.
Is there a way to keep the construction precisely?
After meshing with Mesh and also with QuadRemesh the construction has slightly different volume compared to the original.

Hi Arnold - A mesh is always an approximation. If you want a closer approximation, you need to make a finer mesh - more info here - https://wiki.mcneel.com/rhino/meshfaq

-Pascal

Thank you, i see.