Tutorial Step 2
Now while the selection is active, Let's use Photoshop's Filter>Pixelate>Crystallize.
Change the 'Cell Size' option until the type of edge desired is achieved, Then click OK.
Tutorial Step 4
Now at this step, You can decide what to use the edge on, For this tutorial im going to be using Paper made in the Photoshop Tutorial Photoshop Paper, Also on this site. Check it out.
Tutorial Step 5
Select Magic Wand Tool (W) And select the White area that you've been making, Now make sure the Layer with the Photoshop Paper (Or whatever you're using it on) is active, and Press Delete.
This concludes the Free Photoshop Tutorial Ripped Edge
Well Played fine sir, Well Played.