Autodesk 12812-051462-9011 User Guide 3 - Page 1939

imported geometry is not properly welded, or if the software can't determine the object's center, normals might be oriented in the wrong direction. Use the Edit Mesh or Normal modifiers to flip normals. When this option is off, the software calculates normals according to the face vertex order in the drawing file. Face normals for solid objects are already unified. Make sure this option is off when importing drawings containing solid objects. You should also make sure this option is off when working with AutoCAD Architecture files. AutoCAD solids will never have their normals unified, regardless of the setting of this import toggle. Solids generate faces and normals correctly. Cap closed splines Applies an Extrude modifier to all closed objects, and turns on the Cap Start and Cap End options of the modifier. The Extrude modifier Amount value for a closed entity with no thickness is set to 0. Capping makes closed entities with thickness appear solid and closed entities without thickness appear flat. When Cap Closed Objects is turned off, the Extrude modifier Cap Start and Cap End options for closed entities with thickness are turned off. No modifiers are applied to closed entities without thickness, except for Circle, Trace, and Solid. NOTE If Use Extrude Modifier to Represent Thickness on page 7192 is off, the software does not apply an Extrude modifier to closed objects. Texture mapping The texture mapping settings affect the loading time of models that have many objects with stored UVW Coordinates for texture mapped materials. NOTE This setting only applies to geometry that is stored as a mesh in the scene. Spline shapes marked as renderable have separate controls for UVW coordinate generation on the Spline Rendering panel. ■ No mapping coordinates When No Mapping Coordinates is used, the software not generate texture coordinates for the mesh objects that are imported. When drawings are imported, objects are added to the scene as Editable Mesh objects that do not have UVW coordinate assignments. Before assigning materials to imported objects, you'll need to apply a UVW Map modifier on page 1931 to add texture coordinates. When you then apply the material and the material or texture map is set to Show Map in Viewport, the texture map is displayed if the viewport is set to Smooth + Highlights. If the UVW Map modifier is not applied, the object turns gray and you'll 7194 | Chapter 23 Managing Scenes and Projects