kingoftomorrow, I tried the update suggested by Parkinbot on your file ("enlarge your first cube by a small number"). Then tried various options in my surface remesher until no errors and finally ran it through a program that encapsulates geompack++ "zgp" tetraeder solid mesher, resulting in a tetraeder mesh with about ~28000 nodes in GMSH .msh format, see https://www.expirebox.com/download/b65481d442b9dc90e9df4a935660d4ff.html The mesh can be visualised using GMSH, image below shows part of the mesh clipped away. <http://forum.openscad.org/file/n21265/kingoftomorrow_scad_polyfix_0.jpg> Meshers are generally much more "picky" than 3d print slicers, you really need an error free topology, i.e. only 2-manifold edges and no collapsed faces. This means you have to be careful with overlapping faces and sliver intersections when modelling. In this case surface remeshing worked with tolerance adjustments (ignore faces with area<0.5 and use ignore distances<0.01). Surface mesh size was selected=20 Carsten Arnholm -- View this message in context: http://forum.openscad.org/stl-not-correct-by-mesh-generators-tp21241p21265.html Sent from the OpenSCAD mailing list archive at Nabble.com.