i know a very simple way to do it but it only works from the side and front/back views:
1.) go to the side you want in the editor.
2.) go to view and turn off the grid along with all nodes, vertexes, first segment, and origin.
3.) select the entire ride.
4.) take a screenshot (print screen/ sys rq).
5.) go into any pain sort of program, cut the borders off so all you see is the editor view.
6.)negative the image.
should look something like this (but without a grid, i chose to leave it on)