A much-requested command from customers has been to provide a tool that converts a 2D polyline into a 3D polyline, by draping it onto a surface.
This is useful for draping design elements to represent controls such as limit of works, matching to existing features and to provide 3D information for further design.
If you are looking for a tool to set objects to adopt surface elevations, check out Drape Objects. This command allows you to select the following objects and set the elevations of these to match the surface:
- Polylines
- Lines and arcs
- Text
- CAD Points, and
- Blocks
The command is simple. After selecting the surface you then can pick a layer containing the objects you want or else pick and choose from the drawing. Next, you pick whether to modify the selected objects or create new objects.

You have the option of making copies of the objects or replacing/modifying them.
For polylines, vertices are added to exactly match the surface elevations including all grade breaks.

Due to Autodesk’s adoption of .NET8 architecture in their 2025 release, we have had to change to a new licensing system developed by Soraco (QLM). We are confident that a transition to the new licensing system will not inconvenience customers. A new customer portal is available for customers to manage their V25 licenses. For computer-based single-user licensing, […]

