... continued from the previous page.
Now, Add realism
For the areas that need deeper shadows, first start by filling the area on a separate layer as usual with a solid color, perhaps taken using the Eyedropper tool from nearby areas. Then, add some noise to this layer, at a very low setting such as 1 (Filter > Noise > Add Noise). This adds to the realism and makes it less sterile looking.
Then using the Clone Stamp tool, Alt-click (MAC: Option-click) in a nearby source area and then release and click-and-drag in the new area to create the correct look. Use the same technique as earlier to create shadows on some of the edges (use a large, soft brush on the edges of the selection).
Step 5: Extend Color
Use the Clone Stamp tool again to extend any areas of clothing that would naturally move that way. For this example, I used the Clone Stamp tool to extend the collar to meet in the back.
Step 6: Add more realism
The clothing opening that face the front would have a different shadow than the pant legs and sleeves. Instead of having a shadow on the bottom or on the sides, the shadow would be along a large portion of it to show depth.
You can optionally add some noise to make it more realistic. Here I added a shadow while the area was selected by using the same technique (painting with a large, soft brush) to give the sweater some depth. The illusion is that the sweater is still filled out but empty.
Thanks to Princess Libra for sending this one in ... www.buildtutorial.com