Half transparent shader

Hello guys, i have a small problem with unity's shaders.

I would like to understand how to improve my material.
My goal is to have a rice-paper material, so i need to have the light who can go through.
The mesh isn't à plane but a rectangle very thin.

Thanks a lot !

A.R

 

It seems you look for a translucent object.

I guess you could look at this : http://www.farfarer.com/blog/2012/09/11/translucent-shader-unity3d/