I use Rhino 3D, but not for graphics. It's expensive but I won mine in an art contest.
I use illustrator to get the basic side view down, then import to rhino and build my model, then I manually unfold or unroll each part, make tabs, then export the lines back out for illustrator.
In many cases I will of some of the "graphics" in Rhino as simple lines, which act as guides for illustrator
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