Now we’re going to give it some depth. Create a new layer and select the exact shape of your original green globe by holding down the “CMD/Ctrl” or “Ctrl” key and hovering your mouse over the picture of the circle in your layers palette. You should get a little hand with a square over it – click layer with the green ball in it when you see that – you should see a new dotted circle on top of the original green ball. The dotted line is called a selection and we need it just a little bit smaller, so go to Select > Modify > Contract… Contract it by 10 pixels.