How to make object to be transparent?

Question

code follows

Graphics3D[{EdgeForm[None],
  Import["ExampleData/seashell.stl", "GraphicsComplex"]
  }
 ]

can i make the seashell to be transparent?

example from How to remove “triangle” line from GraphicsComplex objects

Answer 1

According to official documents,Opacity works.

Graphics3D[{EdgeForm[None], Opacity[0.5], 
  Import["ExampleData/seashell.stl", "GraphicsComplex"]}]