Figure 6.21

Duplicating shadow paths

You have just seen how a shape layer represents a shadow by revealing black through its vector mask. It is also possible to use a shape layer to cast a shadow using a layer style effect (Drop Shadow or Inner Shadow).

In this last technique, the layer style effect casts the shadow; you want the shape layer itself to be invisible. Shape layers cannot be filled with transparency. However, you can make a shape layer invisible by using a white color in Darken blending mode. You'll see how this works by creating a shadow that makes the entire framing system appear inset into the facade.

14. Zoom out to 100% magnification. Select the Rectangle tool in the toolbox (under the Line tool). Click the color swatch on the Options bar, and choose pure white in the Color Picker. As you drag out a rectangle that covers the entry area (see Figure 6.22), a new shape layer is created called Shape 1. Rename Shape 1 to Entry Shadow, and set the opacity of this layer to 75%, allowing you to see through.

Chances are, you didn't draw the rectangle directly on top of the line work because you were zoomed out. Line it up and then make the shape layer disappear.

15. Zoom in closely to one corner of the white rectangle. Select the Direct Selection tool (press Shift+A). Drag a selection window around the corner handle and use the arrow keys to nudge the handle on top of the line work below. Repeat this process on each of the four vertices, precisely lining up the handles of the rectangular path with the line work. Change the opacity of the Entry Shadow layer to 100%, and change its blending mode to Darken. Click its vector mask to deselect it. The rectangle completely disappears because the white shape does not darken the image.

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