Make sure you followed the step carefully. you will notice a visual difference with your game. Ive created the file for you, all you have to do is extract it and place it in C:\Program Files\Electronic Arts\Crytek\Crysis
Im also going to provide a link to another guy's tweak.
Its very good but it aims more to increase the look of the game at each settings level.
http://www.crymod.com/thread.php?threadid=21830
I recommend those who want to improve Crysis's look and have the hardware to cope with it.