Attached Link: http://www.rhino3d.com/

Have you tried Rhino 3d? I love it. If you like that vector line stuff in Corel Draw you should like Rhino since you can do so much by just lofting some profile curves. Give the demo a try. Its a limited number saves type demo. Oh yeah, we have an excelent Rhino forum here.

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein