Autodesk 12812-051462-9011 User Guide 3 - Page 1745

Weld threshold Sets the distance that determines whether vertices are coincident. If the distance between two vertices is less than or equal to the weld threshold, the vertices are welded together. To use the Weld Threshold, turn on Weld. Auto-smooth adjacent face Assigns smoothing groups on page 8130 according to the Smooth-angle value. Smoothing groups determine whether faces on an object render as a smooth surface or display a seam at their edges, creating a faceted appearance. Smooth-angle Controls whether smoothing occurs between two adjacent faces. If the angle between the two face normals is less than or equal to the smooth angle, the faces are smoothed (that is, put in the same smoothing group). Orient normals of adjacent faces consistently Analyzes the face normals of each object and flips normals where necessary, so they all point in a direction that is consistent with adjoining faces. If the imported geometry isn't properly welded, or if the AutoCAD geometry did not contain or specify normal information, normals might be oriented in the wrong direction. Use the Edit Mesh on page 1353 or Normal on page 1581modifiers to flip normals. When Unify Normals is off, normals are calculated according to the face vertex order in the linked file. Face normals for AutoCAD solids are already unified. Turn off Unify Normals when importing only AutoCAD solid models from AutoCAD Architecture. Cap closed splines Applies an Extrude modifier on page 1448 to all closed objects, and selects the Cap Start and Cap End options of the modifier. The Extrude modifier Amount value for a closed object with no thickness is set to 0. Capping makes closed objects with thickness appear solid and closed objects without thickness appear flat. When Cap Closed Objects is off, the Extrude modifier Cap Start and Cap End options for closed objects with thickness are clear. No modifiers are applied to closed objects without thickness. TIP Unless you chose the One-to-One sorting option, you won't immediately see the Extrude modifier when selecting an object. To see it, look through the modifier stack for the VIZBlock on page 8165 sub-objects. In a nested VIZBlock, the Extrude modifiers appear at the bottom of the stack. You can then edit the Extrude modifier parameters. Texture Mapping The texture mapping setting can reduce the loading time of models that have many objects with stored UVW Coordinates for texture mapped materials. 7000 | Chapter 23 Managing Scenes and Projects