The method of dark outline with lighter base only shows gloss/shiny surface. not SEE THROUGHness. There is a big difference.
Transparent and Translucent is not necessary gloss/shiny. Transparent/translucent, see through means it can see through. Not define by shade but more on shape. You have to know what is happening BEHIND the surface.

http://www.deimel.org/images/plain_cube.gif > solid
http://www.anopticalillusion.com/wp-..._cube.svg_.png > see through.

I like the idea of the see through. That is smart. Which is why I want you to get it right.