I want to use Mathematica to mesh a 3D solid region for FEM calculation. So I use DiscretizeRegion to generate a MeshRegion object. It contains points, lines, triangles and tetrahedrons information.
But when I export the MeshRegion into a .stl or .obj file, there is only surface data left and inner data is lost. The solid discrete region transformed into a 3D surface. What should I do to export a complete MeshRegion object?
