Realistic crack tutoriall

2. Now select your burn tool with 2 px width, range: highlights and exposure 100%. On the layer of your image, make a crack line.

3. Now, on the same layer (we are only using one layer in this tutorial), with your dodge tool at range: highlights, 2 px and 100% exposure make a line right next to the line you created in step 2. Now you've added some depth!

4. Now, still on the same layer, fasten up the lines. To do this, use the burn tool at range: highlights, 1 px and 100%, and draw above the dark line you created in step 2. Do the same thing with the highlights, only this time draw above the dodge light line.

5. Now here's what I got. I extended the cracks using 50% exposure dodge and burn and I added some lines using the same technique as in step 2 and 3. Looks kinda neat, eh?