Step 1
Open your picture.
Step 2
Take the Lasso Tool (L) and select the teeth.
Step 3
Your selection must looks like this:
Step 4
Now, you must to find some texture of corrosion, tree or stone. Look at the picture below!
Step 5
While your picture of texture is open, press Ctrl+A to select it, and after that press Ctrl+C on the keyboard to copied it (in this example the whole picture).
Step 6
Go back on the first picture (the selection round the teeth is still active).
Step 7
Now, we will insert the texture that we just have copied on the place where the teeth are. So, press Shift+Ctrl+V on the keyboard or choose Edit > Paste into.
Step 8
After you have paste the texture, you can use the arrows on the keyboard to adjust it which you like.
Step 9
Click on texture layer in layers palette, and under blending mode set "Vivid Light", and if is necessarily, decrease the opacity a little. See the picture below!
Step 10
Now, Our picture looks like this:
Using the Hue/Saturation, you can play with color.
Finally, our picture looks like this:
Have a nice day!
