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Edit Mesh > Bridge |
Constructs a bridging polygon mesh (additional faces) between selected pairs of border edges on an existing polygon mesh. The resulting bridging polygon mesh is combined with the original polygon mesh and the edges are merged.
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Edit Mesh > Bridge > 
Bridge type
Controls the profile shape of the bridged region.
Linear path
When the Linear path is selected, the bridging mesh that gets created is straight. That is, the bridge spans between the selected edges in a straight line. The Twist and Taper options are not available when the Linear path option is selected.
Smooth path
When Smooth path is selected, the bridging mesh that gets created transitions between the selected edges in a smooth fashion based on an internal or implied curve. The implied curve, which extends off either side of the selected edges, is created to determine the shape of the bridging mesh. The angle that the curve extends off either set of selected edges is perpendicular to the average of the surface normals on the selected edges for each side. When Smooth path is selected you can modify the shape of the bridging mesh using the Twist and Taper options.
Smooth path + curve
When the Smooth path + curve setting is selected, the bridging mesh that gets created transitions between the selected edges in a smooth fashion. In addition, an explicit curve, that extends off either side of the selected edges, gets created to determine the shape of the bridging mesh. To modify the shape of the bridging mesh, you can either modify the Twist and Taper attributes or manually edit the explicit curve to change the shape.
Twist
Rotates the bridging mesh between the originally selected borders. The default angle is zero. The Twist option is not available when the Bridge type is set to Linear path.
Taper
Controls the shape of the bridged region along its width. The default setting is 1 (no taper). To control the taper exactly you’ll need to open the Polygon Bridge Attributes section in the Attribute Editor and then the Taper Curve section and use the graph control to set scaling along the length of the curve. For more information see the Taper/Taper Curve documentation under Edit Mesh > Extrude. The Taper option is not available when the Bridge type is set to Linear path.
Divisions
Specifies the number of equally spaced segments that get created between the selected border edges.
Bridge offset
Determines how border edges are matched between the original selected pairs. If the bridged mesh twists in an unwanted manner as it spans the region, changing the Bridge offset can correct this. The Bridge offset option only works with border edge selections that form a closed loop.