The big question here is what kind of packaging are you designing. If you are designing cups, thermoforms, tubes, bottles, or any other rigid container then Solidworks is the standard. If you are designing paper folding cartons, then ArtiosCAD is best because you can export a dieline. Bags and wraps are designed in Illustrator because they are flat flexible material that is wrapped around a product. So as I said what i your intended pack?
If you are just looking for a a 3D rendering with no manufacturing output then Strata and 3Dstudio Max are generally the industry standard. That being said, I don’t see why Alias or Rhino wouldn’t be able to deliver a presentation rendering for packaging.
J