Here is a tut from ShelleyRae Torn Paper Tutorial

What I do is use the designer edge feature and the rough torn after I get it the way I want it then I copy the torn page, fill it with a slightly darker (or lighter) than the orginal, and add some texture to it (so it doesn't look so flat). Then I put it behind the original and filp it so the edges don't really match. Here is an example of what I am talking about Torn Paper.

Hope this Helps

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