Get familiar with the tools on the 2D to 3D toolbar.
On those rare occasions where I had to generate 3D from imported
2D, I never used the imported 2D to directly create features. I
always left the imported sketches intact in order to preserve the
record of the source material. From there, I would create new
sketches and use
Convert Entities to copy imported sketch segments before
creating new features. This went a long way toward getting around
the various problems that often exist in imported sketches.
Also, don't expect your imported data to be accurate. Always check.
People lie and cheat all the time, even in drafting.
Jessica,
Get familiar with the tools on the 2D to 3D toolbar.