There are several free lisp routines that will convert 2d linework to a sketch format. I use one called Freehand. I know that LT doesn't support lisp routines but years ago I used LT and an add on that would allow me to run lisp routines. Unfortunately it's been so long that I can't remember the name of the add on program. It may also be possible to export to SketchUp and do something with it there but I'm no expert.
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Michelle Plotnik AIA
Architect
Murphys CA
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