Hello
This works as intended (MMA 10.2)
 
Graphics3D[Cylinder[], Ticks -> Automatic, Axes -> True]
I get ticks along the x,y,z axes.
However when I add the graphics directive Opacity I have to enclose everything between curly brackets but Ticks has no effect and no error message either.
 
Graphics3D[{Opacity[0.5], Cylinder[], Ticks -> Automatic,  Axes -> True}]
How can I display in this case the ticks along the x,y,z axes?
Thanks