- CGAL_MESH_3_DEBUG_INSERTION_RADIUS,
- CGAL_MESH_2_DEBUG_INSERTION_RADIUS,
- CGAL_MESHES_DEBUG_REFINEMENT_POINTS,
- and CGAL_MESH_3_DIRTY_DEBUG_SPHERES.
These are not activated by default, of course. The latter was to debug
test/Mesh_3/combined_spheres.cpp.