OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › custom STL, rename › Reply To: custom STL, rename May 19, 2020 at 2:15 pm #4956 iJokerifyParticipant Dear mathias, what means the watertight? The stl haven’t holes on bounds of material ? Or exists some parameter of stl model which applying the watertight property to stl? Grateful iJoker