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Follow the steps below to create a railing with evenly spaced posts that follows the contour of a mesh.
1. Create a poly line where the railing will be.
2. Open the Set Snap Point Values dialogue box.
3. In the Snap Point Values dialogue box, set the Distance the posts will span and click OK.
4. Select Distance.
5. Select the column tool.
6. Enable the Gravitate command. Make sure that it is set to Gravitate to Mesh.
Note: The Gravitate command will place the columns so that they rest on the top of the mesh. These columns will be used as a guide to place the railing posts.
7. Hover over the poly line until the snap points appear. Place columns on all snap points and end points.
8. Select the columns, right click and choose Show Selection/Marquee in 3D.
9. In 3D, open the Layers dialogue box and set the display to wireframe for the layer that the columns are placed on.
Note: The wireframe view makes it easier to view which hot spot you are snapping to when placing the railing.
10. Select the railing tool and make sure that the Railing and Node Associativity and Segment Associativity are set to Static.
11. Create the railing by snapping to the bottom center hot spot of each column.
12. Delete the columns.