Now we have only one layer that is really easy to work with. Lets process with defining the contour a bit more. "General Blending" should be "Normal" this time but "Inner Glow" should have "Color Burn" blend mode with some dark color. A little bit of noise would look nice as well. And of course it would be great to tear our sheet a bit also. Just use small and sharp eraser for it.
Step 10:
Duplicate the only one layer we have and play with "Inner Glow" of it. Just look at the result when you eraser it in some places.
Step 11:
Create burned style layer to define the torn areas. "Color Burn" for "General Blending" and the same for "Outer Glow.
