Camera split screen - how to get rid of unwanted black border?

I’m trying to do 4-way split screen, using 4 cameras and Normalized View Port Rect. I’m setting the width and height to 0.5 and the respective X and Y coordinates. But unfortunately I’m getting an unwanted horizontal black line - no vertical one though.

Anyone know why this is or how I can get rid of that line? I’ve attached a picture. Thanks for any help.

[13752-screen+shot+2013-07-31+at+18.25.07.png|13752]

Oops! Simple cause and simple solution. If your vertical resolution has an odd number of lines, Unity inserts a black line between the two halves because it can’t evenly divide the resolution in two. So just changing your window size to accommodate an even number of vertical resolution lines solves this.

I want this border. how can i get it? I tried make my viewport smaller but the problem is that I get last camera1 view in this space instead black line when player2 joins and screen is splited