Select here the numerical tolerances used in the Voronoi
tesselation. Changing significantly the default values
may produce bad results.
Tolerance
When building the polyhedrons, if a plane cuts a vertex more 
than the 
Apex tolerance, this vertex is removed.
Faces that have an area smaller than the 
Area tolerance 
are ignored and its topological surroundings are merged.
Vertices that are closer than the 
Vertex tolerance are 
considered the same and its topological surroundings are merged.