I am trying to use the Drape command to create a topographic surface in Rhino 5, by draping over a stack of extruded, closed contours.
I used this method successfully on virtually the same topography two days ago, but now it no longer works on the original topography nor on any new topography; it only returns a flat surface.
The only thing that has happened to the file between now and then is that I temporarily opened the file, which resides on a networked location between a laptop and desktop, on the desktop (from the laptop on which the successful drape was performed) to speed up some rendering.
When I opened the file again on the laptop, the drape command no longer worked.
If anyone has suggestions, I would really appreciate the help!