After a while I decided to follow another tutorial. This one (in portuguese) teaches how to create glass-looking cups:
http://blendertotal.wordpress.com/tutorial-criando-materiais-de-vidro/
It was very difficult to remember all shortcuts and commands, only after 4 months away. Due to this, I’m planning to make a permanent page, a FAQ like page, for future reference. Anyway, here is the final work:
The .blend file will be avaiable soon.
Links I used as reference:
[1] http://wiki.blender.org/index.php/Manual/Specular_Shaders
