Page 54 - Enhancing CAD Drawings with Photoshop

4386.book Page 37 Monday, November 15, 2004 3:27 PM

PAINTING, ADJUSTING, AND FILTERING 37

dialog box interface where you can create a stack of effect layers and see their cumulative effects in a
preview window. Let’s see how it works.
You will open a sample file to try out the Filter Gallery.
1. Open the file Street.psd from the CD.
2. Choose Filter Filter Gallery to open the Filter Gallery.
3. Expand the Artistic folder, and click the Poster Edges filter thumbnail, as shown in Figure 1.38.
4. In the effect control area, change Edge Thickness to 1, Edge Intensity to 3, and Posterization to
3. Each filter will have its own parameters that control the algorithm.

TIP The best way to interact with filters is to experiment with the effects by dragging the parameter
sliders back and forth and observing the changes in the preview area.

5. Click the New Effect Layer button. Click the Artistic folder in the thumbnail area to close it,
and then click the Brush Strokes folder to open that category of filters.
6. Click the Angled Strokes thumbnail. The second filter’s parameters appear in the control area.
Change Direction Balance to 75, Stroke Length to 10, and Sharpness to 8.
Notice that the second effect appears above the first in the effect layer stack. The effect layer
stack is built from the ground up, and each layer has a cumulative effect that you can see in the
preview area.

Figure 1.38
Preview area Filter thumbnail area Filter control area
The Filter Gallery

Effect layer stack
New Effect Layer button
Delete Effect Layer button