No responses yet? maybe everyone is snowed in.
What experience do you have? What hardware do you have?
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composite streamliner travel trailer.... 3D surfaces in complex curves
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So your going to CNC formers for an eggcrate form to shape what?
I honestly don't know the best suggestion. One approach might be a NURBs modeler and slicing software like 3D printers use. Have you thought about the size of the CNC router required?
Personally, I find a box modeler has enough of a leaning curve. I use Wings 3d and it outputs 13 file types including .stl. I use Wings™, .3ds and .obj.
My designs have a simple convex hull that can be defined to eight decimal places. I like the idea of formless construction, using peel patterns. Using a sphere that is oblated differentially on three axes.
Resulting in a motorhome
I'm currently modeling an old trailer I had, a 1953 Silver Streak Clipper. I find that modelling the end caps would be easier in a NURBs modeler.
edit: I have no idea why those IMGs won't embed, you can open them in a new tab.