A bit of an odd brush set, but I got the idea for this one a while back and wanted to give it a go.
It’s holes, tears, ripped areas, etc in jeans.
I’m going to write a little mini-tutorial to go along with this set, so that I can explain how best to use these.

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Here’s the mini-tutorial:
1. Have the jeans texture on its own layer. Here’s a denim texture you can use to play around with it and follow along with this tutorial: denim texture.
2. Make a new layer. (You can do this by clicking on the jean texture layer and then clicking on the “create a new layer” button on the lower right of the layers palette.) Name it “rips” (right click on the layer, select layer properties, and rename it there).
3. On that layer, using white or off white as a color, use whichever of the ripped jeans brushes you like.
4. Make a new layer BETWEEN the jeans texture layer and the “fraying” layer. (Again, do this by clicking on the jean texture layer and then clicking on the “create a new layer” button on the lower right of the layers palette.) Call it “holes” (again, right click on that layer and select layer properties to rename it).
5. Using a regular round brush and black as your selected color, paint in a “hole” beneath where you used the ripped jean brush, wherever you think it looks like it needs it. Check out the image below for samples of the various brushes and what the holes beneath them look like, if you like.
6. Click on the “rips” layer to select it. On the bottom left of the layers palette, click on the “layer properties” button and select bevel & emboss. Add an inner bevel with only a few pixels in size. I added a few pixels worth of softening, too, so that the shadows weren’t so hard edged. Here’s my settings:

7. That’s it! Your brush should look something like those below. Here’s some samples for you.

*** These also work great for if someone is wearing the jeans. Instead of that blackness beneath, you’d see the flesh of someone’s knee, leg, etc. To accomplish that, instead of making that black layer, you could just erase some of the jeans texture layer to let that leg show through. Don’t forget to add shadows! ***