New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Importing stl files › Reply To: Importing stl files September 17, 2024 at 10:31 am #9248 mathiasKeymaster Have you checked that your material numbers where set correctly?