OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › custom STL, rename › Reply To: custom STL, rename May 19, 2020 at 2:07 pm #4955 mathiasKeymaster For me the output looks ok. You sould make sure that the stl is watertight and that the resolution requested really resolves the porous media. Best Mathias