Model CAD programs

Almost all CAD programs will give you 2D drawings from 3D drawings. I know of none that will easily/or even with a lot of work give you 3D from 2D drawings. However, if you are building a scale model, a good set of 2D drawings ought to be more than sufficient to draw up a set of builder's plans. There are many programs that will convert a scanned in raster images to a vector format (all I've tried don't do this without a significant amount of work). Once in a vector format, the rest is easy....to get to 2D builder's drawings. In the third place, 3D drawings are of questionable value to build a model anyway......

No cad program can do this automatically.