Add 3D Shadow in the Thumbnails of nautilus

Nautilus should be the most used file manager in linux as is that comes default with Ubuntu. Here we can see thumbnails of images or videos with an edge inelegant. In this super simple tutorial I explains how to change that edge by an effect on 3D.

This is how it should be:

And to do it alone we should write these commands in the console:
wget http://a.imageshack.us/img135/8666/