SMOOTHMESHCONVERT - controls mesh objects mode conversion to 3D solids or surfaces are smoothed or faceted, and whether their faces are merged. 0 (default) - creates a smooth model. Coplanar faces are optimized and merged in one face. 1 - creates a smooth model. Original mesh faces are retained in the converted object. 2 - creates a model with flattened faces. Coplanar faces are optimized and merged. 3 - creates a model with flattened faces. Original mesh faces are retained in the converted object.