planar boundary faces
 

Hi,
I am creating a polyhedral Mesh form a stl file in ccm+. The boundary faces of the resulting mesh are not planar. Is there a tolarance parameter somewhere to restrict the boundary faces to be planar?
Maybe someone has a hint,
Martin.

Since your mesh is not respecting the boundary surfaces, you might try first creating a decent surface mesh, not using the initial STL "surface mesh" and then use the surface mesh to create the volume mesh, thereby respecting the surface.

If computational expense is not an issue you and the above does not work a crude way to do it would be to drastically reduce the surface mesh size and convert the transition to very fast.