Fairytale Scene - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 443

Figure 9.41
We'll now create a shadow on the wall to the left side of the wardrobe, which will
fake the look of light coming through the window panels.
10. Add a new blank layer to the top of the layer stack, and name it window . Press D
to set the foreground and background colors to their default of black and white
(black being the foreground color), and choose the Custom Shape tool from the
toolbar ( Figure 9.42 ) .