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Menu: Draw / Surface Patch

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Fits a smooth surface between any three or four lines, curves, or arcs which meet at their endpoints to form a closed area.

Point 1: First line

Point 2: Second line

Point 3: Third line

Point 4: Fourth line (optional)

Specify the grid spacing for the surface.

The line entities must share endpoints and make up a closed area or Surface Patch will not work properly. Press Enter when you are finished. The lines are used as a boundary for a surface.