Problem with transparent layers in acc

Hello. My problem look like the pic:

I've been studying S4S posts, and I think my problem is related to this post.

Well, the first mesh was from EA, so I don't know how it was created and I couldn't separate the faces. So I chose to do another one.

I started positioning the faces from top to bottom. After finishing I joined them. Soon I duplicated the mesh and flip the normals inside.

The result was the image below. I'm not sure I did it correctly. Although there is no overlap of the front, at other angles it remains the same.




How could I solve this?


Some additional information:

• I used glasses as a base package;
  
  
• The trunk is in a cut separate from the leaves.

Very grateful. (I used Google translate)