Autodesk 663B1-05A111-1001 User Guide - Page 281

12 | Basics Menus Reference > Modify > Convert > NURBS to Subdiv, Polygons to Subdiv Standard Fit method. Control Points method. Notes When you use the Control Points Tessellation Method: • The Type option you set is ignored and the resulting polygon is in Quads by default. • If you convert trimmed NURBS surfaces the surfaces convert as though they were not trimmed. When you use the Attach Multiple Output Meshes option, the operation may fail to attach surfaces for a variety of reasons: • When attaching a number of surfaces, and some of the surfaces are extremely small, the tolerance must be set to an appropriately small value or the attach operation will fail. • When attaching multiple surfaces, all of the surfaces must be contiguous to within the user-defined tolerance. Separated regions cannot be attached in a single operation. Use the attach operation multiple times for this case; once for each contiguous region. • The surfaces to be attached must have their normals facing in the same direction or the attach will fail. Modify > Convert > NURBS to Subdiv, Polygons to Subdiv Both conversion operations (NURBS to Subdiv and Polygons to Subdiv) have the same options in the options window. Maximum Base Mesh Faces Set the maximum number of faces the original surface can have to successfully convert it to a subdivision surface. For example, if the original surface has 900 faces and the Maximum Base Mesh Faces value is 1000, the conversion will succeed, but if the surface has 1200 faces, the conversion will fail. Depending on the complexity of the original object, the resulting surface may be represented with fewer faces. Basics 281