To Clean the Faceted Geometry
1. Click > 
Clean. The Clean dialog box opens.
Clean. The Clean dialog box opens.2. Select the region for cleaning. If you do not select a region, the operation is performed on the entire model.
3. Select the mode for cleaning the facet geometry.
◦ Free-form—Cleans and smooths the surface geometry with respect to the surface curvature if the faceted surface represents a freeform or organic shape.
◦ Mechanical—Retains sharp corners and edges while cleaning the geometry if the faceted surface represents a mechanical or prismatic shape.
4. Click OK.